asn.dev

Observed topology

AS21433 ACCENTUREFSSC London DC

Unclassified RIPE

Upstreams 79 carry this network
Downstreams 1 this network carries
Adjacent (IPv4) 73
Adjacent (IPv6) 37
Upstream graph Who carries AS21433, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS21433 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 79

Networks observed carrying traffic for AS21433: 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
AS9498BHARTI Airtel Ltd.MobileIPv43,604
AS4755TATA Communications formerly VSNL is Leading ISPHostingIPv4 IPv62,822
AS8220COLT Technology Services Group LimitedHostingIPv4 IPv61,347
AS2516KDDI CORPORATIONMobileIPv4 IPv6988
AS3356Level 3 Parent, LLCTransitIPv4 IPv6700
AS4713NTT DOCOMO BUSINESS,Inc.ResidentialIPv4 IPv6623
AS12874Fastweb SpAResidentialIPv4 IPv6613
AS4775Globe TelecomsUnclassifiedIPv4557
AS55410Vodafone Idea LtdMobileIPv4 IPv6549
AS9658Eastern Telecoms Phils., Inc.UnclassifiedIPv4517

All 79 upstreams →

Transit

Downstream networks

inferred

Networks for which AS21433 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS55423JasTel NetworkUnclassifiedIPv4 IPv6130

Adjacency

Adjacent networks

All 79

Every AS seen directly next to AS21433 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS9498BHARTI Airtel Ltd.MobileIPv43,604
AS4755TATA Communications formerly VSNL is Leading ISPHostingIPv4 IPv62,822
AS8220COLT Technology Services Group LimitedHostingIPv4 IPv61,347
AS2516KDDI CORPORATIONMobileIPv4 IPv6988
AS3356Level 3 Parent, LLCTransitIPv4 IPv6700
AS4713NTT DOCOMO BUSINESS,Inc.ResidentialIPv4 IPv6623
AS12874Fastweb SpAResidentialIPv4 IPv6613
AS4775Globe TelecomsUnclassifiedIPv4557
AS55410Vodafone Idea LtdMobileIPv4 IPv6549
AS9658Eastern Telecoms Phils., Inc.UnclassifiedIPv4517

All 79 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.22M 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.