Data as of Nov 8, 2026
143.81.0.0/16
No anonymizer space · no proxy exits in 30 daysUnited States Department of Defense (DoD)
Announcements
Nesting
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Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 143.81.0.0/17 since Sep 2016 | AS721 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.8.0/21 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.16.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.18.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.25.0/24 since Feb 2018 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.27.0/24 since Sep 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.32.0/24 since May 2021 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.36.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.48.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.49.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.50.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.51.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.52.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.53.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.54.0/23 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.58.0/24 since Mar 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.59.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.61.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.62.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.72.0/22 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.90.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.103.0/24 since Jul 2020 | AS721 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.105.0/24 since Jun 2012 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.106.0/24 since Jun 2012 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.112.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.128.0/17 since Sep 2016 | AS721 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.200.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.201.0/24 since Apr 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.222.0/24 since Sep 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.223.0/24 since Sep 2026 | AS6034 | Business | United States Department of Defense (DoD) via Headquarters, USAISC | |
| 143.81.224.0/19 since Apr 2026 | AS6034 | 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 |
|---|---|---|---|---|---|---|
| 143.81.0.0/16 | 65,536 | KUWAIT-NET1 | United States Department of Defense (DoD) (USDDD) · US | Direct Allocation | Mar 26, 1990 | disa. |
| └ 143.81.0.0/16 | 65,536 | KUWAIT-NET1 | Headquarters, USAISC (HEADQU-3) · US | Reallocated | Aug 21, 2025 | — |
Network & registry
Registry
Holder
- Organization
- United States Department of Defense (DoD)
- Handle
- USDDD
- Range
- 143.
81. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Mar 26, 1990
- Legacy
- yes
- Reallocated to
- Headquarters, USAISC (HEADQU-3)
- Reallocated
- Aug 21, 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
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Dec 2010 · 16 yr
- Origin networks
- 4
- Last change of origin
- Dec 2010
Recorded history
History
- Handoffs
- 4
Whois
Registration for this announcement
- Range
- 143.
81. 0. 0/ 16 - Netname
- KUWAIT-NET1
- 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-143-81-0-0-2
- Parent
- NET-143-81-0-0-1
- Created
- Aug 21, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 26, 1990
- Status
- assigned
Report abuse
Abuse contact
- nobody@
example. com - Name
- No, Contact Known
- Phone
- +1-800-555-1234
- Handle
- CKN23-ARIN