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AS2500WIDE Project

JapanRegistryAPNICTypeEyeball

As of 26th September 2026, AS2500 (WIDE Project), an access network registered in Japan with APNIC, originates 3 IPv4 prefixes covering 65.5k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 3,621st-largest of the 79,480 networks we see originating IPv4, and the 145th-largest of 729 in Japan. It is seen behind 15 upstream networks, most often AS17676 (SoftBank Corp.) and AS2914 (NTT America, Inc.), and in front of 21 downstream networks. 75% 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.

At a glance

IPv4 prefixes

3

IPv6 prefixes

1

IPv4 addresses

65.5k

IPv6 /64s

4.3B

Upstream graph

The networks AS2500 is seen behind, one and two hops out, drawn from real AS paths.

AS2500Toward the internet core
Upstream graph for AS2500: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS2500WIDE ProjectThis networkAS2497Internet Initiati…AS2914NTT America, Inc.AS6939Hurricane Electri…AS17676SoftBank Corp.AS24482SG.GSAS3130RGnet OUAS49544i3D.net B.VAS1299Arelion (fka. Tel…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS6453TATA Communicatio…AS38623Metfone (Viettel …

Networks observed one and two hops upstream of AS2500 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

368

adjacent networks

Upstreams
154%
Peers
33290%
Downstreams
216%

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

Upstreams of AS2500
NetworkCountryRelationshipPathsVantage pts
AS17676SoftBank Corp.JPPeer811101
AS2914NTT America, Inc.USPeer34186
AS6939Hurricane Electric LLCUSPeer14820
AS24482SG.GSSGPeer452
AS2497Internet Initiative Japan Inc.JPPeer445
AS7530BroadBand Tower, Inc.JPPeer4242
AS18106Viewqwest Pte LtdSGPeer414
AS7660Asia Pacific Advanced Network - JapanJPPeer412
AS199524Gcore S.A.LUPeer271
AS9002RETN LimitedGBPeer262

Prefixes

The largest blocks AS2500 originates, widest first.

Largest prefixes originated by AS2500
PrefixAddressesVisibility
203.178.128.0/1732.8k80/81
133.4.128.0/1816.4k80/81
202.249.0.0/1816.4k80/81
2001:200::/324.3B × /6463/64

Routing health

How AS2500'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

  • Valid75.0%3
  • Invalid0.0%0
  • No ROA25.0%1

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

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS2500 started or stopped in this period.

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