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AS405Air Force Systems Networking

United StatesRegistryARIN

As of 25th October 2026, AS405 (Air Force Systems Networking), a network registered in the United States with ARIN, originates 1 IPv4 prefix covering 256 addresses. By IPv4 address space that makes it the 59,196th-largest of the 79,700 networks we see originating IPv4, and the 12,896th-largest of 18,496 in the United States. It is seen behind 1 upstream network, most often AS27066 (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

1

IPv6 prefixes

0

IPv4 addresses

256

IPv6 /64s

0

Upstream graph

The networks AS405 is seen behind, one and two hops out, drawn from real AS paths.

AS405Toward the internet core
Upstream graph for AS405: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS405Air Force Systems…This networkAS27066United States Dep…AS721United States Dep…AS27064Defense Informati…

Networks observed one and two hops upstream of AS405 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 AS405
NetworkCountryRelationshipPathsVantage pts
AS27066United States Department of Defense (DoD)USPeer7676

Prefixes

The largest blocks AS405 originates, widest first.

Largest prefixes originated by AS405
PrefixAddressesVisibility
139.241.8.0/2425676/76

Routing health

How AS405'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%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%1
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

Recent changes

Announcements that started or stopped since 25th Sept 2026.

No announcement by AS405 started or stopped in this period.

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