asn.dev

Observed topology

AS4637 ASN-TELSTRA-GLOBAL - Telstra Global

Unclassified APNIC

Upstreams 48 carry this network
Downstreams 488 this network carries
Adjacent (IPv4) 540
Adjacent (IPv6) 204
Upstream graph Who carries AS4637, and who carries them, drawn as a map up to the transit-free core. 37 exchanges Where AS4637 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 48

Networks observed carrying traffic for AS4637: 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 ABTransitIPv47,372
AS6939Hurricane Electric LLCTransitIPv4 IPv66,212
AS3356Level 3 Parent, LLCTransitIPv4 IPv65,791
AS3257GTT Communications Inc.TransitIPv43,994
AS577Bell CanadaMobileIPv41,314
AS9002RETN LimitedUnclassifiedIPv41,298
AS3303Swisscom (Schweiz) AGResidentialIPv41,294
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv61,290
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv61,166
AS6461Zayo BandwidthTransitIPv41,026

All 48 upstreams →

Transit

Downstream networks

All 488

Networks for which AS4637 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS1221Telstra LimitedMobileIPv4 IPv615,598
AS19551Incapsula IncHostingIPv4 IPv66,321
AS16509Amazon.com, Inc.HostingIPv45,271
AS18403FPT Telecom CompanyResidentialIPv4 IPv64,258
AS55547Unit D,E,F,G 28th FloorUnclassifiedIPv4 IPv64,210
AS38478SunnyVision LimitedHostingIPv43,888
AS18186Nebula Global LLCHostingIPv4 IPv63,783
AS10024LGA InternationalUnclassifiedIPv4 IPv63,147
AS20940Akamai International B.V.HostingIPv4 IPv63,034
AS2514NTT PC Communications, Inc.HostingIPv4 IPv62,848

All 488 downstreams →

Adjacency

Adjacent networks

All 540

Every AS seen directly next to AS4637 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1221Telstra LimitedMobileIPv4 IPv6572,283
AS3356Level 3 Parent, LLCTransitIPv4 IPv6128,851
AS6939Hurricane Electric LLCTransitIPv4 IPv6115,331
AS6461Zayo BandwidthTransitIPv4 IPv688,166
AS3257GTT Communications Inc.TransitIPv4 IPv667,833
AS577Bell CanadaMobileIPv4 IPv659,598
AS1299Arelion Sweden ABTransitIPv4 IPv656,585
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv655,173
AS4657StarHub LtdResidentialIPv452,550
AS64049Reliance Jio Infocomm Pte Ltd SingaporeUnclassifiedIPv4 IPv645,455

All 540 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.