Data as of Nov 3, 2026
55.0.0.0/8
No anonymizer spaceUnited States Department of Defense (DoD)
Announcements
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400 of 1,188
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More specific
Announcements inside
400 of 1,188
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 55.1.0.0/16 since Feb 2019 | AS359 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.0.0/16 since Jan 2017 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.2.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.3.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.4.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.5.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.6.0/24 since Apr 2019 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.7.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.8.0/24 since Apr 2019 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.9.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.10.0/24 since Apr 2019 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.11.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.12.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.13.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.14.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.15.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.16.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.17.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.18.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.19.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.20.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.21.0/24 since Nov 2020 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.22.0/23 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.24.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.25.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.26.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.27.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.28.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.29.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.31.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.33.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.34.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.35.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.36.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.37.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.38.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.39.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.40.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.41.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.43.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.45.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.46.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.47.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.48.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.49.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.50.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.51.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.52.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.53.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.54.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.55.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.57.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.59.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.60.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.62.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.63.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.64.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.67.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.69.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.70.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.71.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.72.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.73.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.75.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.78.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.80.0/24 since Aug 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.81.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.82.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.83.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.84.0/22 since Apr 2019 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.88.0/22 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.92.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.93.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.94.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.95.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.96.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.97.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.98.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.99.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.100.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.101.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.102.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.104.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.105.0/24 since Oct 2025 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.106.0/24 since Nov 2025 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.107.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.108.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.109.0/24 since Jan 2022 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.110.0/24 since Oct 22, 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.111.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.113.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.114.0/24 since Oct 2025 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.115.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.117.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.118.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.119.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.120.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.124.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.125.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.126.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.127.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.128.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.129.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.131.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.132.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.133.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.134.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.135.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.136.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.137.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.138.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.139.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.140.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.141.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.142.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.143.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.144.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.145.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.146.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.147.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.150.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.153.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.156.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.159.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.160.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.163.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.164.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.168.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.172.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.173.0/24 since May 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.174.0/24 since Aug 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.176.0/24 since Sep 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.188.0/22 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.196.0/22 since Jul 2021 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.201.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.202.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.203.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.204.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.205.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.206.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.207.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.208.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.209.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.210.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.211.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.212.0/24 since Jun 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.213.0/24 since Sep 2026 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.215.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.216.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.217.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.218.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.219.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.220.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.221.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.222.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.224.0/22 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.228.0/23 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.230.0/24 since Mar 2020 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.231.0/24 since Mar 2020 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.232.0/24 since Mar 2020 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.233.0/24 since Nov 2020 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.234.0/23 since Nov 2020 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.236.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.237.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.238.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.239.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.240.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.241.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.243.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.244.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.245.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.246.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.247.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.248.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.250.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.252.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.253.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.2.254.0/24 since Jun 2023 | AS344 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.3.0.0/16 since Apr 2017 | AS345 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.3.102.0/24 since Oct 2025 | AS345 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.3.104.0/24 since Oct 2025 | AS345 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.3.251.0/24 since Apr 2019 | AS345 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.3.252.0/24 since Apr 2019 | AS345 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.4.0.0/16 since Apr 2025 | AS350 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.4.192.0/18 since Aug 2025 | AS350 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.5.0.0/16 since Aug 2026 | AS360 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.6.0.0/16 since Mar 2020 | AS361 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.0.0/16 since Sep 2019 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.113.0/24 since Sep 2020 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.116.0/24 since Nov 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.162.0/24 since Jul 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.164.0/24 since Aug 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.166.0/24 since Aug 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.200.0/21 since Nov 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.225.0/24 since Nov 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.236.0/24 since Jun 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.237.0/24 since Sep 2020 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.239.0/24 since Nov 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.243.0/24 since Aug 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.244.0/24 since Apr 2025 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.245.0/24 since Apr 2021 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.246.0/24 since Sep 2020 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.247.0/24 since Aug 2020 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.7.248.0/24 since Sep 2020 | AS362 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.8.0.0/16 since Nov 2009 | AS316 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.10.0.0/16 since May 2005 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.11.0.0/16 since Sep 2016 | AS317 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.11.8.0/24 since Aug 2023 | AS317 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.11.16.0/24 since Dec 2023 | AS317 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.11.144.0/23 since Jul 2023 | AS317 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.11.150.0/24 since Dec 2023 | AS317 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.11.151.0/24 since Dec 2023 | AS317 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.11.152.0/21 since Jul 2023 | AS317 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.0.0/16 since Sep 2008 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.3.0/24 since Apr 2019 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.8.0/24 since Apr 2019 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.10.0/24 since Apr 2019 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.15.0/24 since Apr 2019 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.35.0/24 since Oct 2025 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.72.0/21 since May 2023 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.101.0/24 since Jun 2021 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.13.216.0/22 since Sep 2025 | AS346 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.15.0.0/16 since May 2005 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.15.200.0/22 since Dec 2019 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.0.0/16 since Oct 2016 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.2.0/24 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.124.0/23 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.126.0/23 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.199.0/24 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.201.0/24 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.208.0/23 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.210.0/24 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.211.0/24 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.16.213.0/24 since Oct 2025 | AS364 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.17.0.0/16 since May 2005 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.17.73.0/24 since Apr 2019 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.18.0.0/16 since Aug 2016 | AS365 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.19.0.0/16 since Jan 2020 | AS331 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.19.2.0/24 since Feb 2023 | AS331 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.20.0.0/16 since Apr 2020 | AS1530 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.20.7.0/24 since Mar 2025 | AS1530 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.20.32.0/23 since Mar 2025 | AS1530 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.20.89.0/24 since Apr 2025 | AS1530 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.20.95.0/24 since Mar 2025 | AS1530 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.0.0/16 since Aug 2011 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.50.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.51.0/24 since Jul 2019 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.52.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.53.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.54.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.55.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.57.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.58.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.59.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.60.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.61.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.62.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.65.0/24 since Jul 2019 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.66.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.67.0/24 since Oct 2025 | AS348 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.22.69.0/24 since Apr 2019 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.0.0/16 since Aug 2026 | AS32000 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.8.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.9.0/24 since Mar 2026 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.11.0/24 since Mar 2026 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.22.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.23.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.25.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.27.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.28.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.29.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.31.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.33.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.35.0/24 since Jan 2022 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.103.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.129.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.23.182.0/24 since Dec 2019 | AS349 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.0.0/16 since Nov 2009 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.20.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.87.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.229.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.230.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.231.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.232.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.234.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.236.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.24.251.0/24 since Apr 2019 | AS321 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.25.0.0/16 since Aug 2011 | AS320 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.25.5.0/24 since Apr 2019 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.25.160.0/22 since Apr 2019 | AS320 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.0.0/16 since Jan 2009 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.52.0/22 since Feb 2020 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.68.0/24 since Aug 2024 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.163.0/24 since Apr 2019 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.164.0/24 since Apr 2019 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.166.0/24 since Apr 2019 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.167.0/24 since Apr 2019 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.26.168.0/24 since Aug 2023 | AS319 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.0.0/16 since Sep 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.42.0/24 since Sep 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.44.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.48.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.52.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.54.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.58.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.64.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.66.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.68.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.70.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.72.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.74.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.76.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.78.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.80.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.82.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.84.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.90.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.94.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.96.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.99.0/24 since Aug 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.100.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.104.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.108.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.112.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.116.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.118.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.120.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.124.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.128.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.146.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.148.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.152.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.156.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.160.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.166.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.168.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.170.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.172.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.176.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.177.0/24 since Aug 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.178.0/24 since Apr 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.180.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.181.0/24 since Apr 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.182.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.183.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.184.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.185.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.186.0/24 since Apr 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.188.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.189.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.191.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.192.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.193.0/24 since Apr 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.194.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.195.0/24 since Apr 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.196.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.198.0/24 since Apr 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.199.0/24 since Feb 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.200.0/24 since May 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.201.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.202.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.203.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.204.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.205.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.206.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.207.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.208.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.209.0/24 since Sep 28, 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.211.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.212.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.213.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.214.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.215.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.217.0/24 since May 2026 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.219.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.27.221.0/24 since Jan 2025 | AS335 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.28.0.0/16 since Apr 2025 | AS336 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.28.0.0/23 since Apr 2026 | AS336 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.30.0.0/16 since Aug 2016 | AS350 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.30.192.0/18 since Apr 2026 | AS350 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.32.0.0/16 since Nov 2008 | AS352 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.32.80.0/24 since Apr 2019 | AS352 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.32.81.0/24 since Apr 2019 | AS352 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.32.82.0/24 since Apr 2019 | AS352 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.32.83.0/24 since Aug 2026 | AS352 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.34.0.0/16 since Feb 2014 | AS338 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.34.24.0/24 since Apr 2026 | AS338 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.34.44.0/23 since Jun 2021 | AS338 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.34.211.0/24 since Mar 2026 | AS338 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.35.0.0/16 since Sep 2008 | AS322 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.35.124.0/24 since Jul 2021 | AS322 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.36.0.0/16 since Oct 2009 | AS323 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.36.249.0/24 since Dec 2019 | AS323 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.37.0.0/16 since Aug 2009 | AS351 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.38.0.0/16 since Sep 2017 | AS306 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.39.0.0/16 since Aug 2011 | AS324 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.39.25.0/24 since Apr 2019 | AS324 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.39.26.0/24 since Apr 2019 | AS324 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.39.27.0/24 since Mar 2024 | AS324 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 55.39.31.0/24 since Mar 2024 | AS324 | Business | United States Department of Defense (DoD) via Headquarters, USAISC |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 55.0.0.0/8 | 16,777,216 | CONUS-RCAS | United States Department of Defense (DoD) (USDDD) · US | Direct Allocation | Oct 26, 1996 | [email protected] |
| └ 55.0.0.0/8 | 16,777,216 | CONUS-RCAS | Headquarters, USAISC (HEADQU-3) · US | Reallocated | Aug 20, 2025 | — |
| └ 55.15.0.0/16 | 65,536 | ARNG-GU-NET | Headquarters, USAISC (HEADQU-3) · US | Reallocated | Aug 20, 2025 | — |
| └ 55.16.0.0/16 | 65,536 | ARNG-HI-NET | Headquarters, USAISC (HEADQU-3) · US | Reallocated | Aug 20, 2025 | — |
| └ 55.23.0.0/16 | 65,536 | ARNG-LA-NET | National Guard Bureau (C11553543) · US | Reassigned | Mar 25, 2026 | — |
Network & registry
Registry
Holder
- Organization
- United States Department of Defense (DoD)
- Handle
- USDDD
- Range
- 55.0.0.0/8
- Registration type
- Direct Allocation
- Record created
- Oct 26, 1996
- Legacy
- yes
- Reallocated to
- Headquarters, USAISC (HEADQU-3)
- Reallocated
- Aug 20, 2025
Origin network
AS721
US
- Name
- United States Department of Defense (DoD)
- Type
- Business
- Domain
- mail.mil
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- First seen
- Before our records
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 55.0.0.0/8
- Netname
- CONUS-RCAS
- Registrant
- Headquarters, USAISC
- Organization
- Headquarters, USAISC (HEADQU-3)
- Org address
- NETC-ANC CONUS TNOSC, Fort Huachuca, AZ, 85613
- Org country
- US
- Type
- Reallocated
- Handle
- NET-55-0-0-0-2
- Parent
- NET-55-0-0-0-1
- Created
- Aug 20, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Oct 26, 1996
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Network DoD
- Phone
- +1-844-347-2457
- Handle
- MIL-HSTMST-ARIN