asn.dev

Observed topology

AS6421 AS6421 - TATA COMMUNICATIONS (AMERICA) INC

Unclassified ARIN

Upstreams 11 carry this network
Downstreams 8 this network carries
Adjacent (IPv4) 20
Adjacent (IPv6) 5
Upstream graph Who carries AS6421, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS6421 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 11

Networks observed carrying traffic for AS6421: 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
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv61,733
AS6939Hurricane Electric LLCTransitIPv4191
AS8220COLT Technology Services Group LimitedHostingIPv429
AS17639Converge ICT Solutions Inc.UnclassifiedIPv426
AS24482SG.GSHostingIPv426
AS37989DCS1 Pte. Ltd.HostingIPv426
AS38001NewMedia Express Pte LtdHostingIPv426
AS9507NextHop Pty LtdUnclassifiedIPv423
AS55720Gigabit Hosting Sdn BhdHostingIPv418
AS4635Hong Kong Internet Exchange--Route Server 1UnclassifiedIPv43

All 11 upstreams →

Transit

Downstream networks

inferred

Networks for which AS6421 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS139341ACEHostingIPv4 IPv6573
AS10794Bank of America, National AssociationUnclassifiedIPv4236
AS56043PEPSICO INTERNATIONAL PTE. LTD.UnclassifiedIPv4113
AS396356Latitude.shHostingIPv4 IPv671
AS14630Invesco Group Services, Inc.UnclassifiedIPv4 IPv625
AS63804DOVA CorporationUnclassifiedIPv417
AS3762InstinetUnclassifiedIPv414
AS10361Bloomberg, LPUnclassifiedIPv48

Adjacency

Adjacent networks

All 20

Every AS seen directly next to AS6421 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv62,035
AS8220COLT Technology Services Group LimitedHostingIPv4 IPv6761
AS139341ACEHostingIPv4 IPv6585
AS6939Hurricane Electric LLCTransitIPv4282
AS10794Bank of America, National AssociationUnclassifiedIPv4236
AS63804DOVA CorporationUnclassifiedIPv4147
AS56043PEPSICO INTERNATIONAL PTE. LTD.UnclassifiedIPv4113
AS396356Latitude.shHostingIPv4 IPv678
AS24482SG.GSHostingIPv449
AS37989DCS1 Pte. Ltd.HostingIPv442

All 20 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-07 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 72.97M 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.