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AS1555United States Department of Defense (DoD)

United StatesRegistryARIN

As of 22nd October 2026, AS1555 (United States Department of Defense…), a network registered in the United States with ARIN, originates 2 IPv4 prefixes covering 65.8k addresses. By IPv4 address space that makes it the 3,516th-largest of the 79,655 networks we see originating IPv4, and the 1,214th-largest of 18,475 in the United States. It is seen behind 1 upstream network, most often AS1554 (United States Department of Defense…), and in front of 1 downstream network. 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

2

IPv6 prefixes

0

IPv4 addresses

65.8k

IPv6 /64s

0

Upstream graph

The networks AS1555 is seen behind, one and two hops out, drawn from real AS paths.

AS1555Toward the internet core
Upstream graph for AS1555: 2 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1555United States Dep…This networkAS1554United States Dep…AS1540Headquarters, USA…

Networks observed one and two hops upstream of AS1555 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

4

adjacent networks

Upstreams
125%
Peers
250%
Downstreams
125%

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

Upstreams of AS1555
NetworkCountryRelationshipPathsVantage pts
AS1554United States Department of Defense (DoD)USPeer10,84077

Prefixes

The largest blocks AS1555 originates, widest first.

Largest prefixes originated by AS1555
PrefixAddressesVisibility
136.210.0.0/1665.5k77/77
143.86.204.0/2425677/77

Routing health

How AS1555'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%2

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

  • Withdrawn139.139.99.0/2420th Oct 2026

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