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AS6421TATA COMMUNICATIONS (AMERICA) INC

United StatesRegistryARIN

As of 12th November 2026, AS6421 (TATA COMMUNICATIONS (AMERICA) INC), a network registered in the United States with ARIN, originates 37 IPv4 prefixes covering 10k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 10,745th-largest of the 80,772 networks we see originating IPv4, and the 3,252nd-largest of 18,759 in the United States. It is seen behind 19 upstream networks, most often AS6453 (TATA Communications (America) Inc) and AS8220 (COLT), and in front of 11 downstream networks. 92% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 92% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

37

IPv6 prefixes

1

IPv4 addresses

10k

IPv6 /64s

65.5k

Upstream graph

The networks AS6421 is seen behind, one and two hops out, drawn from real AS paths.

AS6421Toward the internet core
Upstream graph for AS6421: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS6421TATA COMMUNICATIO…This networkAS4766Korea TelecomAS6453TATA Communicatio…AS6939Hurricane Electri…AS8220COLTAS14537Continent 8 LLCAS32590Valve CorporationAS132337AxclusiveAS20130Depaul UniversityAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS6421 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

81

adjacent networks

Upstreams
1923%
Peers
5163%
Downstreams
1114%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS6421
NetworkCountryRelationshipPathsVantage pts
AS6453TATA Communications (America) IncUSPeer2,773140
AS8220COLTGBPeer1,13486
AS4766Korea TelecomKRPeer11514
AS6939Hurricane Electric LLCUSPeer846
AS14537Continent 8 LLCUSPeer822
AS35280F5 Networks SARLFRPeer713
AS7713PT Telkom Indonesia TbkIDAdjacent642
AS24482SG.GSSGPeer491
AS132337AxclusiveSGAdjacent491
AS49544i3D.net B.VNLPeer481

Prefixes

All 38

The largest blocks AS6421 originates, widest first.

Largest prefixes originated by AS6421
PrefixAddressesVisibility
103.16.252.0/2351266/78
103.16.254.0/2351278/78
116.0.66.0/2425678/78
138.104.230.0/2425678/78
138.104.231.0/2425678/78
180.87.13.0/2425678/78
180.87.29.0/2425678/78
180.87.68.0/2425678/78
180.87.91.0/2425677/78
180.87.92.0/2425677/78

Routing health

How AS6421's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid92.1%35
  • Invalid0.0%0
  • No ROA7.9%3

Propagation

  • Globally propagated90% of full-feed peers or more92.1%35
  • Partially propagated40% to 90%2.6%1
  • Seen by few peersUnder 40%5.3%2

Prefix sizes

IPv4 — 37 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 13th Oct 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.