Data as of Nov 4, 2026
Autonomous system

AS331

United States Department of Defense (DoD)

Announces 196,608 addresses in 5 prefixes. None of it is anonymizer space.

Type
Business
US

Announced prefixes

Arrived
PrefixTypeHolderRPKI
55.19.0.0/16
since Jan 2020
Business
via Headquarters, USAISC
55.19.2.0/24
since Feb 2023
Business
via Headquarters, USAISC
55.65.0.0/16
since Aug 2021
Business
via Headquarters, USAISC
55.70.0.0/16
since Dec 2009
Business
via Headquarters, USAISC
55.70.190.0/24
since Feb 2023
Business
via Headquarters, USAISC

Network & history

Routing patterns

How its announcements have moved

Arrivals

Year each prefix's current origin began announcing it