AS6421 — AS6421 - TATA COMMUNICATIONS AMERICA INC

AS6421 announces 26 IPv4 prefixes covering 9,984 addresses and 1 IPv6 prefixes.

About this network

The US arm of Tata Communications, the Indian-headquartered global carrier. The ARIN record sits with Tata Communications (America) Inc. in Herndon, Virginia.

What it's used for

• Carrier and transit services on Tata's global IP backbone: this AS originates a modest set of prefixes rather than serving end users, and the space it carries is drawn from Tata's own address ranges.
• Tata Communications' main global backbone is a separate, much larger AS; this one is a US-registered network within the same group.

Notable

• The ASN was registered with ARIN in 1996, well before Tata's involvement: the US business traces back through Teleglobe and VSNL, which Tata acquired in the 2000s. The registrant name was updated to Tata Communications, so the number carries a lineage older than its current holder.
• Be careful not to conflate this AS with Tata's Indian consumer or enterprise networks; it is the American entity.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 103.16.252.0/22
• 116.0.66.0/24
• 138.104.230.0/23
• 180.87.13.0/24
• 180.87.29.0/24
• 180.87.68.0/24
• 180.87.91.0/24
• 180.87.92.0/24
• 180.87.115.0/24
• 180.87.119.0/24
• 180.87.120.0/23
• 180.87.122.0/24
• 180.87.124.0/24
• 180.87.126.0/23
• 180.87.138.0/23
• 180.87.140.0/23
• 180.87.152.0/23
• 180.87.190.0/23
• 202.183.64.0/23
• 202.183.66.0/24
• 202.183.69.0/24
• 202.183.70.0/24
• 202.183.72.0/24
• 202.183.74.0/23
• 202.183.76.0/23
• 202.183.79.0/24
• 2405:2001:100::/48

Upstream networks

• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS6939 Hurricane Electric LLC
• AS57463 NetIX Communications JSC
• AS38001 NewMedia Express Pte Ltd
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS8220 COLT Technology Services Group Limited
• AS9507 NextHop Pty Ltd
• AS55720 Gigabit Hosting Sdn Bhd
• AS4766 Korea Telecom
• AS4635 Hong Kong Internet Exchange--Route Server 1

Downstream networks

• AS139341 ACE
• AS10794 Bank of America, National Association
• AS56043 PEPSICO INTERNATIONAL PTE. LTD.
• AS396356 Latitude.sh
• AS10146 Ford Motor Company
• AS14630 Invesco Group Services, Inc.
• AS3762 Instinet
• AS63804 DOVA Corporation
• AS10361 Bloomberg, LP

Adjacent networks

• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS8220 COLT Technology Services Group Limited
• AS139341 ACE
• AS6939 Hurricane Electric LLC
• AS10794 Bank of America, National Association
• AS56043 PEPSICO INTERNATIONAL PTE. LTD.
• AS396356 Latitude.sh
• AS63804 DOVA Corporation
• AS10146 Ford Motor Company
• AS24482 SG.GS
• AS57463 NetIX Communications JSC
• AS38001 NewMedia Express Pte Ltd
• AS17639 Converge ICT Solutions Inc.
• AS14630 Invesco Group Services, Inc.
• AS9507 NextHop Pty Ltd
• AS55720 Gigabit Hosting Sdn Bhd
• AS3762 Instinet
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS10361 Bloomberg, LP
• AS4766 Korea Telecom

Internet exchanges

• Hong Kong Internet Exchange — Hong Kong, China
• Singapore Internet Exchange — Singapore, Singapore