subnet.im

AS749United States Department of Defense (DoD)

United StatesRegistryARINTypeEyeball

As of 26th September 2026, AS749 (United States Department of Defense…), an access network registered in the United States with ARIN, originates 3,133 IPv4 prefixes covering 227M addresses. By IPv4 address space that makes it the largest of the 79,480 networks we see originating IPv4, and the largest of 18,421 in the United States. It is seen behind 1 upstream network, most often AS3356 (Lumen (Level 3)). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

3,133

IPv6 prefixes

0

IPv4 addresses

227M

IPv6 /64s

0

Upstream graph

The networks AS749 is seen behind, one and two hops out, drawn from real AS paths.

AS749Toward the internet core
Upstream graph for AS749: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS749United States Dep…This networkAS3356Lumen (Level 3)AS2914NTT America, Inc.AS3549Lumen (fka. Globa…

Networks observed one and two hops upstream of AS749 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 AS749
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer251,18781

Prefixes

All 3,133

The largest blocks AS749 originates, widest first.

Largest prefixes originated by AS749
PrefixAddressesVisibility
7.0.0.0/816.8M80/81
11.0.0.0/816.8M79/81
21.0.0.0/816.8M79/81
22.0.0.0/816.8M79/81
26.0.0.0/816.8M79/81
28.0.0.0/816.8M79/81
29.0.0.0/816.8M79/81
30.0.0.0/816.8M80/81
33.0.0.0/816.8M79/81
214.128.0.0/98.4M80/81

Routing health

How AS749'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%3,133

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3,133
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3,133 prefixes

Recent changes

Announcements that started or stopped since 27th Aug 2026.

  • Announced131.11.0.0/1622nd Sept 2026
  • Announced139.242.72.0/2422nd Sept 2026
  • Withdrawn139.243.0.0/1621st Sept 2026
  • Withdrawn139.244.0.0/1421st Sept 2026
  • Withdrawn139.40.244.0/2221st Sept 2026
  • Withdrawn140.13.178.0/2321st Sept 2026

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