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AS647United States Department of Defense (DoD)

United StatesRegistryARIN

As of 23rd October 2026, AS647 (United States Department of Defense…), a network registered in the United States with ARIN, originates 374 IPv4 prefixes covering 384k addresses. By IPv4 address space that makes it the 835th-largest of the 79,659 networks we see originating IPv4, and the 210th-largest of 18,482 in the United States. It is seen behind 1 upstream network, most often AS27066 (United States Department of Defense…). None of its announcements have a valid RPKI ROA. 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

374

IPv6 prefixes

0

IPv4 addresses

384k

IPv6 /64s

0

Upstream graph

The networks AS647 is seen behind, one and two hops out, drawn from real AS paths.

AS647Toward the internet core
Upstream graph for AS647: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS647United States Dep…This networkAS27066United States Dep…AS721United States Dep…AS27064Defense Informati…

Networks observed one and two hops upstream of AS647 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 AS647
NetworkCountryRelationshipPathsVantage pts
AS27066United States Department of Defense (DoD)USPeer28,50777

Prefixes

All 374

The largest blocks AS647 originates, widest first.

Largest prefixes originated by AS647
PrefixAddressesVisibility
138.183.0.0/1732.8k77/77
205.59.0.0/198.2k77/77
205.60.0.0/198.2k77/77
205.71.0.0/198.2k77/77
205.72.0.0/198.2k77/77
205.98.224.0/198.2k77/77
205.58.0.0/204.1k77/77
205.58.176.0/204.1k77/77
205.59.192.0/204.1k77/77
205.64.0.0/204.1k77/77

Routing health

How AS647'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%374

Propagation

  • Globally propagated90% of full-feed peers or more98.9%370
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%1.1%4

Prefix sizes

IPv4 — 374 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

244 announced and 266 withdrawn in all; the most recent are shown.

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