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AS36631Verisign Anycast US 1A

United StatesRegistryARIN

As of 14th November 2026, AS36631 (Verisign Anycast US 1A), a network registered in the United States with ARIN, originates 15 IPv4 prefixes covering 3.8k addresses and 11 IPv6 prefixes. By IPv4 address space that makes it the 18,937th-largest of the 80,844 networks we see originating IPv4, and the 5,197th-largest of 18,774 in the United States. It is seen behind 1 upstream network, most often AS7342 (VeriSign Infrastructure & Operations). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 0% of its routes reach at least 90% of full-feed peers, and 26 prefixes are also originated by another network.

At a glance

IPv4 prefixes

15

IPv6 prefixes

11

IPv4 addresses

3.8k

IPv6 /64s

721k

Upstream graph

The networks AS36631 is seen behind, one and two hops out, drawn from real AS paths.

AS36631Toward the internet core
Upstream graph for AS36631: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS36631Verisign Anycast …This networkAS7342VeriSign Infrastr…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS36631 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 AS36631
NetworkCountryRelationshipPathsVantage pts
AS7342VeriSign Infrastructure & OperationsUSPeer19156

Prefixes

All 26

The largest blocks AS36631 originates, widest first.

Largest prefixes originated by AS36631
PrefixAddressesVisibility
185.100.0.0/242568/78
192.34.234.0/2425613/78
192.35.51.0/2425615/78
192.42.93.0/2425615/78
192.42.174.0/242568/78
192.42.176.0/242561/78
192.42.178.0/242568/78
192.43.172.0/2425615/78
192.54.112.0/2425615/78
192.58.128.0/242563/78

Routing health

How AS36631'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

  • Valid100.0%26
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more0.0%0
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%100.0%26

Prefix sizes

IPv4 — 15 prefixes

IPv6 — 11 prefixes

  • /4865.5k × /64100.0%11

Recent changes

Announcements that started or stopped since 15th Oct 2026.

26 announced and 26 withdrawn in all; the most recent are shown.

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