subnet.im

AS2497Internet Initiative Japan Inc.

JapanRegistryAPNICTypeCarrier

As of 26th September 2026, AS2497 (Internet Initiative Japan Inc.), a transit carrier registered in Japan with APNIC, originates 237 IPv4 prefixes covering 4.2M addresses and 11 IPv6 prefixes. By IPv4 address space that makes it the 158th-largest of the 79,480 networks we see originating IPv4, and the 7th-largest of 729 in Japan. It is seen behind 35 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 335 downstream networks. 57% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

237

IPv6 prefixes

11

IPv4 addresses

4.2M

IPv6 /64s

17.7B

Upstream graph

The networks AS2497 is seen behind, one and two hops out, drawn from real AS paths.

AS2497Toward the internet core
Upstream graph for AS2497: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS2497Internet Initiati…This networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS3491PCCW Global (HK) …AS6453TATA Communicatio…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS3549Lumen (fka. Globa…AS8220COLTAS35280F5 Networks SARL

Networks observed one and two hops upstream of AS2497 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

711

adjacent networks

Upstreams
355%
Peers
34148%
Downstreams
33547%

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

Upstreams of AS2497
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer47,39950
AS2914NTT America, Inc.USPeer30,80451
AS6453TATA Communications (America) IncUSPeer25,09834
AS3356Lumen (Level 3)USPeer24,01339
AS3491PCCW Global (HK) Ltd.HKPeer21,89212
AS174Cogent Communications, LLCUSPeer17,17331
AS6667Elisa OyjFIPeer15,1564
AS13030Init7 (Switzerland) Ltd.CHPeer12,8905
AS7713PT Telkom Indonesia TbkIDPeer12,1974
AS3257GTT Communications Inc.USPeer9,99629

Prefixes

All 248

The largest blocks AS2497 originates, widest first.

Largest prefixes originated by AS2497
PrefixAddressesVisibility
172.122.0.0/15131k81/81
81.203.0.0/1665.5k81/81
121.102.0.0/1665.5k81/81
125.30.0.0/1665.5k81/81
129.249.0.0/1665.5k81/81
131.248.0.0/1665.5k81/81
132.179.0.0/1665.5k81/81
133.110.0.0/1665.5k81/81
133.111.0.0/1665.5k81/81
133.127.0.0/1665.5k81/81

Routing health

How AS2497'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

  • Valid56.9%141
  • Invalid0.0%0
  • No ROA43.1%107

Propagation

  • Globally propagated90% of full-feed peers or more100.0%248
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 237 prefixes

IPv6 — 11 prefixes

  • /324.3B × /6436.4%4
  • /36268M × /6418.2%2
  • /4865.5k × /6445.5%5

Recent changes

Announcements that started or stopped since 27th Aug 2026.

41 announced and 0 withdrawn in all; the most recent are shown.

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