asn.dev

Observed topology

AS2497 IIJ Internet Initiative Japan Inc.

Unclassified DROP-listed space APNIC NSP

Upstreams 25 carry this network
Downstreams 326 this network carries
Adjacent (IPv4) 331
Adjacent (IPv6) 136
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 25

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 IPv62,753
AS2914NTT America, Inc.TransitIPv4 IPv62,200
AS6939Hurricane Electric LLCTransitIPv4 IPv61,900
AS174Cogent Communications, LLCTransitIPv4 IPv61,844
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 25 upstreams →

Transit

Downstream networks

All 326

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 IPv624,830
AS9605NTT DOCOMO, INC.MobileIPv4 IPv614,880
AS4694IDC Frontier Inc.HostingIPv4 IPv610,650
AS16509Amazon.com, Inc.HostingIPv410,385
AS9824JCOM Co., Ltd.ResidentialIPv4 IPv67,091
AS9498BHARTI Airtel Ltd.MobileIPv45,032
AS59109Hitachi,Ltd., Managed & Platform Services Business DivisionUnclassifiedIPv43,835
AS6327Shaw CommunicationsResidentialIPv43,829
AS17514Otsuka Corp.HostingIPv43,599
AS7713PT Telekomunikasi IndonesiaResidentialIPv43,507

All 326 downstreams →

Adjacency

Adjacent networks

All 331

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

ASNetworkTypeFamiliesPaths seen
AS3356Level 3 Parent, LLCTransitIPv4 IPv6179,656
AS174Cogent Communications, LLCTransitIPv4 IPv6146,093
AS3257GTT Communications Inc.TransitIPv4 IPv6118,372
AS1299Arelion Sweden ABTransitIPv4 IPv6100,786
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv691,106
AS2914NTT America, Inc.TransitIPv4 IPv678,774
AS6939Hurricane Electric LLCTransitIPv4 IPv653,878
AS3491PCCW Global (HK) Ltd.TransitIPv443,639
AS2907Research Organization of Information and Systems, National Institute of InformaticsUnclassifiedIPv4 IPv641,705
AS58453China Mobile International LimitedUnclassifiedIPv432,937

All 331 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-23 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.15M 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.