subnet.im

AS356United States Department of Defense (DoD)

United StatesRegistryARIN

As of 22nd October 2026, AS356 (United States Department of Defense…), a network registered in the United States with ARIN, originates 43 IPv4 prefixes covering 142k addresses. By IPv4 address space that makes it the 1,724th-largest of the 79,655 networks we see originating IPv4, and the 497th-largest of 18,475 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

43

IPv6 prefixes

0

IPv4 addresses

142k

IPv6 /64s

0

Upstream graph

The networks AS356 is seen behind, one and two hops out, drawn from real AS paths.

AS356Toward the internet core
Upstream graph for AS356: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS356United States Dep…This networkAS306United States Dep…AS367United States Dep…AS1540Headquarters, USA…

Networks observed one and two hops upstream of AS356 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 AS356
NetworkCountryRelationshipPathsVantage pts
AS306United States Department of Defense (DoD)USPeer3,31077

Prefixes

All 43

The largest blocks AS356 originates, widest first.

Largest prefixes originated by AS356
PrefixAddressesVisibility
55.48.0.0/1665.5k77/77
55.89.0.0/1665.5k77/77
55.89.174.0/2351277/77
55.89.234.0/2351277/77
55.48.200.0/2425677/77
55.89.33.0/2425677/77
55.89.36.0/2425677/77
55.89.77.0/2425676/77
55.89.85.0/2425677/77
55.89.96.0/2425677/77

Routing health

How AS356'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%43

Propagation

  • Globally propagated90% of full-feed peers or more100.0%43
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 43 prefixes

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

27 announced and 27 withdrawn in all; the most recent are shown.

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