subnet.im

AS337United States Department of Defense (DoD)

United StatesRegistryARIN

As of 23rd October 2026, AS337 (United States Department of Defense…), a network registered in the United States with ARIN, originates 62 IPv4 prefixes covering 85.2k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 2,640th-largest of the 79,666 networks we see originating IPv4, and the 845th-largest of 18,482 in the United States. It is seen behind 1 upstream network, most often AS306 (United States Department of Defense…). 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

62

IPv6 prefixes

1

IPv4 addresses

85.2k

IPv6 /64s

16.8M

Upstream graph

The networks AS337 is seen behind, one and two hops out, drawn from real AS paths.

AS337Toward the internet core
Upstream graph for AS337: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS337United States Dep…This networkAS306United States Dep…AS367United States Dep…AS1540Headquarters, USA…

Networks observed one and two hops upstream of AS337 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

3

adjacent networks

Upstreams
133%
Peers
267%
Downstreams
00%

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

Upstreams of AS337
NetworkCountryRelationshipPathsVantage pts
AS306United States Department of Defense (DoD)USPeer4,837140

Prefixes

All 63

The largest blocks AS337 originates, widest first.

Largest prefixes originated by AS337
PrefixAddressesVisibility
55.188.0.0/1665.5k77/77
55.188.188.0/221k77/77
55.188.32.0/2351277/77
55.188.96.0/2351277/77
55.188.116.0/2351277/77
55.188.118.0/2351277/77
55.188.120.0/2351277/77
55.188.128.0/2351277/77
55.188.160.0/2351277/77
55.188.192.0/2351277/77

Routing health

How AS337'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%63

Propagation

  • Globally propagated90% of full-feed peers or more100.0%63
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 62 prefixes

IPv6 — 1 prefixes

  • /4016.8M × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

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