subnet.im

AS18640Idealab

United StatesRegistryARIN

As of 24th October 2026, AS18640 (Idealab), a network registered in the United States with ARIN, originates 3 IPv4 prefixes covering 1k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 35,827th-largest of the 79,664 networks we see originating IPv4, and the 8,133rd-largest of 18,488 in the United States. It is seen behind 2 upstream networks, most often AS7018 (AT&T Enterprises, LLC) and AS174 (Cogent Communications, LLC). 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

3

IPv6 prefixes

1

IPv4 addresses

1k

IPv6 /64s

65.5k

Upstream graph

The networks AS18640 is seen behind, one and two hops out, drawn from real AS paths.

AS18640Toward the internet core
Upstream graph for AS18640: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS18640IdealabThis networkAS174Cogent Communicat…AS7018AT&T Enterprises,…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS2914NTT America, Inc.AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS18640 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

5

adjacent networks

Upstreams
240%
Peers
360%
Downstreams
00%

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

Upstreams of AS18640
NetworkCountryRelationshipPathsVantage pts
AS7018AT&T Enterprises, LLCUSPeer16555
AS174Cogent Communications, LLCUSPeer11878

Prefixes

The largest blocks AS18640 originates, widest first.

Largest prefixes originated by AS18640
PrefixAddressesVisibility
208.76.2.0/2351275/76
208.76.0.0/2425675/76
208.76.1.0/2425675/76
2001:550:a01::/4865.5k × /6458/63

Routing health

How AS18640'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%4

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS18640 started or stopped in this period.

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