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AS5371United States Department of Defense (DoD)

United StatesRegistryARIN

As of 23rd October 2026, AS5371 (United States Department of Defense…), a network registered in the United States with ARIN, originates 259 IPv4 prefixes covering 232k addresses. By IPv4 address space that makes it the 1,178th-largest of the 79,659 networks we see originating IPv4, and the 328th-largest of 18,482 in the United States. It is seen behind 1 upstream network, most often AS27064 (Defense Information Systems Agency…). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

259

IPv6 prefixes

0

IPv4 addresses

232k

IPv6 /64s

0

Upstream graph

The networks AS5371 is seen behind, one and two hops out, drawn from real AS paths.

AS5371Toward the internet core
Upstream graph for AS5371: 2 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS5371United States Dep…This networkAS27064Defense Informati…AS721United States Dep…

Networks observed one and two hops upstream of AS5371 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS5371
NetworkCountryRelationshipPathsVantage pts
AS27064Defense Information Systems Agency (DISA)USPeer19,89677

Prefixes

All 259

The largest blocks AS5371 originates, widest first.

Largest prefixes originated by AS5371
PrefixAddressesVisibility
205.56.0.0/198.2k77/77
205.71.128.0/198.2k77/77
205.57.0.0/204.1k77/77
205.59.32.0/204.1k77/77
205.59.160.0/204.1k77/77
205.62.0.0/204.1k77/77
205.68.224.0/204.1k77/77
205.68.240.0/204.1k77/77
205.70.128.0/204.1k77/77
205.70.192.0/204.1k77/77

Routing health

How AS5371's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%259

Propagation

  • Globally propagated90% of full-feed peers or more100.0%259
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 259 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

206 announced and 179 withdrawn in all; the most recent are shown.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.