asn.dev

Observed topology

AS2497 IIJ - Internet Initiative Japan Inc.

Unclassified DROP-listed space APNIC NSP

Upstreams 24 carry this network
Downstreams 331 this network carries
Adjacent (IPv4) 337
Adjacent (IPv6) 140
Upstream graph Who carries AS2497, and who carries them, drawn as a map up to the transit-free core. 15 exchanges Where AS2497 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 24

Networks observed carrying traffic for AS2497: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv62,732
AS2914NTT America, Inc.TransitIPv4 IPv62,180
AS6939Hurricane Electric LLCTransitIPv4 IPv62,163
AS174Cogent Communications, LLCTransitIPv4 IPv61,627
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,380
AS3257GTT Communications Inc.TransitIPv4702
AS5511Orange S.A.TransitIPv4 IPv6624
AS577Bell CanadaMobileIPv4 IPv6538
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv6527
AS1257Tele2 Sverige ABMobileIPv4 IPv6269

All 24 upstreams →

Transit

Downstream networks

All 331

Networks for which AS2497 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS2907Research Organization of Information and Systems, National Institute of InformaticsUnclassifiedIPv4 IPv624,221
AS9605NTT DOCOMO, INC.MobileIPv4 IPv614,524
AS16509Amazon.com, Inc.HostingIPv410,627
AS4694IDC Frontier Inc.HostingIPv4 IPv610,163
AS9824JCOM Co., Ltd.ResidentialIPv4 IPv67,252
AS9498BHARTI Airtel Ltd.MobileIPv45,052
AS6327Shaw CommunicationsResidentialIPv43,836
AS59109Hitachi,Ltd., Managed & Platform Services Business DivisionUnclassifiedIPv43,705
AS17514Otsuka Corp.HostingIPv43,538
AS7713PT Telekomunikasi IndonesiaResidentialIPv43,486

All 331 downstreams →

Adjacency

Adjacent networks

All 337

Every AS seen directly next to AS2497 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3356Level 3 Parent, LLCTransitIPv4 IPv6182,229
AS174Cogent Communications, LLCTransitIPv4 IPv6143,979
AS3257GTT Communications Inc.TransitIPv4 IPv6118,299
AS1299Arelion Sweden ABTransitIPv4 IPv6104,079
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv695,529
AS2914NTT America, Inc.TransitIPv4 IPv670,076
AS6939Hurricane Electric LLCTransitIPv4 IPv656,879
AS3491PCCW Global (HK) Ltd.TransitIPv443,250
AS2907Research Organization of Information and Systems, National Institute of InformaticsUnclassifiedIPv4 IPv640,774
AS58453China Mobile International LimitedUnclassifiedIPv432,795

All 337 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.