subnet.im

AS300United States Department of Defense (DoD)

United StatesRegistryARIN

As of 22nd October 2026, AS300 (United States Department of Defense…), a network registered in the United States with ARIN, originates 35 IPv4 prefixes covering 96.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 2,450th-largest of the 79,655 networks we see originating IPv4, and the 782nd-largest of 18,475 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

35

IPv6 prefixes

1

IPv4 addresses

96.8k

IPv6 /64s

65.5k

Upstream graph

The networks AS300 is seen behind, one and two hops out, drawn from real AS paths.

AS300Toward the internet core
Upstream graph for AS300: 2 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS300United States Dep…This networkAS27064Defense Informati…AS721United States Dep…

Networks observed one and two hops upstream of AS300 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 AS300
NetworkCountryRelationshipPathsVantage pts
AS27064Defense Information Systems Agency (DISA)USPeer2,758140

Prefixes

All 36

The largest blocks AS300 originates, widest first.

Largest prefixes originated by AS300
PrefixAddressesVisibility
158.15.0.0/1665.5k77/77
214.66.0.0/198.2k77/77
214.23.48.0/204.1k77/77
164.235.104.0/212k77/77
214.23.0.0/212k77/77
214.23.24.0/212k77/77
214.23.64.0/212k77/77
214.23.248.0/212k77/77
160.137.132.0/221k77/77
160.137.136.0/221k77/77

Routing health

How AS300'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%36

Propagation

  • Globally propagated90% of full-feed peers or more100.0%36
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 35 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

No announcement by AS300 started or stopped in this period.

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