subnet.im

AS21840WiredISP Inc.

United StatesRegistryARIN

As of 11th November 2026, AS21840 (WiredISP Inc.), a network registered in the United States with ARIN, originates 40 IPv4 prefixes covering 10.2k addresses. By IPv4 address space that makes it the 10,514th-largest of the 80,733 networks we see originating IPv4, and the 3,204th-largest of 18,751 in the United States. It is seen behind 1 upstream network, most often AS10122 (NETSTAR (SG) PTE. LTD.). 93% of its announcements have a valid RPKI ROA; 3 are RPKI-invalid. 93% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

40

IPv6 prefixes

0

IPv4 addresses

10.2k

IPv6 /64s

0

Upstream graph

The networks AS21840 is seen behind, one and two hops out, drawn from real AS paths.

AS21840Toward the internet core
Upstream graph for AS21840: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21840WiredISP Inc.This networkAS10122NETSTAR (SG) PTE.…AS174Cogent Communicat…AS3257GTT Communication…

Networks observed one and two hops upstream of AS21840 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 AS21840
NetworkCountryRelationshipPathsVantage pts
AS10122NETSTAR (SG) PTE. LTD.SGPeer2,80976

Prefixes

All 40

The largest blocks AS21840 originates, widest first.

Largest prefixes originated by AS21840
PrefixAddressesVisibility
2.26.221.0/242561/76
31.57.229.0/2425676/76
31.58.101.0/2425675/76
45.73.169.0/2425676/76
65.87.6.0/2425676/76
69.166.234.0/2425676/76
75.127.68.0/2425676/76
79.172.219.0/242561/76
80.91.218.0/2425676/76
82.26.160.0/2425675/76

Routing health

How AS21840'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

  • Valid92.5%37
  • Invalid7.5%3
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more92.5%37
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%7.5%3

Prefix sizes

IPv4 — 40 prefixes

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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