6421 AS6421 - TATA COMMUNICATIONS (AMERICA) INC, US
Adjacency: 8 Upstream: 3 Downstream: 5
Upstream Adjacent AS list
AS8220 COLT - COLT Technology Services Group Limited, GB
AS9507 NEXTHOP-AS-AP - NextHop Pty Ltd, AU
AS6453 AS6453 - TATA COMMUNICATIONS (AMERICA) INC, US
Downstream Adjacent AS list
AS63804 DOVA-YFM-NET - DOVA Corporation, JP
AS139341 ACE-AS-AP - ACE, SG
AS396356 LATITUDE-SH - Latitude.sh, US
AS10794 BANKAMERICA - Bank of America, National Association, US
AS56043 PEPSI-AS-AP - PEPSICO INTERNATIONAL PTE. LTD., SG
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 10192 AS6421 ORG+TRN Originate: 9984 /18.71 Transit: 1280 /21.68 AS6421 - TATA COMMUNICATIONS (AMERICA) INC, US
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 4477 AS6421 AS6421 - TATA COMMUNICATIONS (AMERICA) INC, U 37 22 11 26 11 29.73% Prefix AS Path Aggregation Suggestion 103.16.252.0/22 4777 2516 6453 6421 + Announce - aggregate of 103.16.252.0/23 (4777 2516 6453 6421) and 103.16.254.0/23 (4777 2516 6453 6421) 103.16.252.0/23 4777 2516 6453 6421 - Withdrawn - aggregated with 103.16.254.0/23 (4777 2516 6453 6421) 103.16.254.0/23 4777 2516 6453 6421 - Withdrawn - aggregated with 103.16.252.0/23 (4777 2516 6453 6421) 116.0.66.0/24 4777 2516 6453 6421 138.104.230.0/23 4777 2516 6453 6421 + Announce - aggregate of 138.104.230.0/24 (4777 2516 6453 6421) and 138.104.231.0/24 (4777 2516 6453 6421) 138.104.230.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 138.104.231.0/24 (4777 2516 6453 6421) 138.104.231.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 138.104.230.0/24 (4777 2516 6453 6421) 180.87.13.0/24 4777 2516 6453 6421 180.87.29.0/24 4608 9507 6421 180.87.68.0/24 4777 2516 6453 6421 180.87.91.0/24 4608 7575 6453 6421 180.87.92.0/24 4777 2516 6453 6421 180.87.115.0/24 4608 9507 6421 180.87.119.0/24 4608 7575 8220 6421 180.87.120.0/23 4777 2516 6453 6421 + Announce - aggregate of 180.87.120.0/24 (4777 2516 6453 6421) and 180.87.121.0/24 (4777 2516 6453 6421) 180.87.120.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.121.0/24 (4777 2516 6453 6421) 180.87.121.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.120.0/24 (4777 2516 6453 6421) 180.87.122.0/24 4777 2516 6453 6421 180.87.124.0/24 4777 2516 6453 6421 180.87.126.0/23 4777 2516 6453 6421 + Announce - aggregate of 180.87.126.0/24 (4777 2516 6453 6421) and 180.87.127.0/24 (4777 2516 6453 6421) 180.87.126.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.127.0/24 (4777 2516 6453 6421) 180.87.127.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.126.0/24 (4777 2516 6453 6421) 180.87.138.0/23 4777 2516 6453 6421 + Announce - aggregate of 180.87.138.0/24 (4777 2516 6453 6421) and 180.87.139.0/24 (4777 2516 6453 6421) 180.87.138.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.139.0/24 (4777 2516 6453 6421) 180.87.139.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.138.0/24 (4777 2516 6453 6421) 180.87.140.0/23 4777 2516 6453 6421 + Announce - aggregate of 180.87.140.0/24 (4777 2516 6453 6421) and 180.87.141.0/24 (4777 2516 6453 6421) 180.87.140.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.141.0/24 (4777 2516 6453 6421) 180.87.141.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.140.0/24 (4777 2516 6453 6421) 180.87.152.0/23 4777 2516 6453 6421 + Announce - aggregate of 180.87.152.0/24 (4777 2516 6453 6421) and 180.87.153.0/24 (4777 2516 6453 6421) 180.87.152.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.153.0/24 (4777 2516 6453 6421) 180.87.153.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.152.0/24 (4777 2516 6453 6421) 180.87.190.0/23 4777 2516 6453 6421 + Announce - aggregate of 180.87.190.0/24 (4777 2516 6453 6421) and 180.87.191.0/24 (4777 2516 6453 6421) 180.87.190.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.191.0/24 (4777 2516 6453 6421) 180.87.191.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 180.87.190.0/24 (4777 2516 6453 6421) 202.183.64.0/23 4608 9507 6421 + Announce - aggregate of 202.183.64.0/24 (4608 9507 6421) and 202.183.65.0/24 (4608 9507 6421) 202.183.64.0/24 4608 9507 6421 - Withdrawn - aggregated with 202.183.65.0/24 (4608 9507 6421) 202.183.65.0/24 4608 9507 6421 - Withdrawn - aggregated with 202.183.64.0/24 (4608 9507 6421) 202.183.66.0/24 4777 2516 6453 6421 202.183.69.0/24 4777 2516 6453 6421 202.183.70.0/24 4777 2516 6453 6421 202.183.72.0/24 4608 9507 6421 202.183.74.0/23 4608 9507 6421 + Announce - aggregate of 202.183.74.0/24 (4608 9507 6421) and 202.183.75.0/24 (4608 9507 6421) 202.183.74.0/24 4608 9507 6421 - Withdrawn - aggregated with 202.183.75.0/24 (4608 9507 6421) 202.183.75.0/24 4608 9507 6421 - Withdrawn - aggregated with 202.183.74.0/24 (4608 9507 6421) 202.183.76.0/23 4777 2516 6453 6421 + Announce - aggregate of 202.183.76.0/24 (4777 2516 6453 6421) and 202.183.77.0/24 (4777 2516 6453 6421) 202.183.76.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 202.183.77.0/24 (4777 2516 6453 6421) 202.183.77.0/24 4777 2516 6453 6421 - Withdrawn - aggregated with 202.183.76.0/24 (4777 2516 6453 6421) 202.183.79.0/24 4777 2516 6453 6421
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS6421 37 More Specifics 37 Total Advertisements AS6421 - TATA COMMUNICATIONS (AMERICA) INC, US
103.16.252.0/23 103.16.252.0/22
103.16.254.0/23 103.16.252.0/22
116.0.66.0/24 116.0.64.0/19
138.104.230.0/24 138.104.0.0/16
138.104.231.0/24 138.104.0.0/16
180.87.13.0/24 180.87.0.0/17
180.87.29.0/24 180.87.0.0/17
180.87.68.0/24 180.87.0.0/17
180.87.91.0/24 180.87.0.0/17
180.87.92.0/24 180.87.0.0/17
180.87.115.0/24 180.87.0.0/17
180.87.119.0/24 180.87.0.0/17
180.87.120.0/24 180.87.0.0/17
180.87.121.0/24 180.87.0.0/17
180.87.122.0/24 180.87.0.0/17
180.87.124.0/24 180.87.0.0/17
180.87.126.0/24 180.87.0.0/17
180.87.127.0/24 180.87.0.0/17
180.87.138.0/24 180.87.128.0/18
180.87.139.0/24 180.87.128.0/18
180.87.140.0/24 180.87.128.0/18
180.87.141.0/24 180.87.128.0/18
180.87.152.0/24 180.87.128.0/18
180.87.153.0/24 180.87.128.0/18
180.87.190.0/24 180.87.128.0/18
180.87.191.0/24 180.87.128.0/18
202.183.64.0/24 202.183.64.0/20
202.183.65.0/24 202.183.64.0/20
202.183.66.0/24 202.183.64.0/20
202.183.69.0/24 202.183.64.0/20
202.183.70.0/24 202.183.64.0/20
202.183.72.0/24 202.183.64.0/20
202.183.74.0/24 202.183.64.0/20
202.183.75.0/24 202.183.64.0/20
202.183.76.0/24 202.183.64.0/20
202.183.77.0/24 202.183.64.0/20
202.183.79.0/24 202.183.64.0/20
whois: 402613
IANA has recorded AS6421 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS6421\n
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
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# If you see inaccuracies in the results, please report at
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
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ASNumber: 6421
ASName: AS6421
ASHandle: AS6421
RegDate: 1996-04-09
Updated: 2014-04-22
Ref: https://rdap.arin.net/registry/autnum/6421
OrgName: TATA COMMUNICATIONS (AMERICA) INC
OrgId: TCA-51
Address: 2355 Dulles Corner Boulevard Suite 700
City: Herndon
StateProv: VA
PostalCode: 20171
Country: US
RegDate: 2014-01-28
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/TCA-51
OrgAbuseHandle: IPNOC14-ARIN
OrgAbuseName: IP NOC
OrgAbusePhone: +15148687888
OrgAbuseEmail: 6453abuse@tatacommunications.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/IPNOC14-ARIN
OrgTechHandle: IPADM470-ARIN
OrgTechName: IP Admin
OrgTechPhone: +1 514 868 7313
OrgTechEmail: ip-addr@tatacommunications.com
OrgTechRef: https://rdap.arin.net/registry/entity/IPADM470-ARIN
OrgNOCHandle: IPNOC14-ARIN
OrgNOCName: IP NOC
OrgNOCPhone: +15148687888
OrgNOCEmail: 6453abuse@tatacommunications.com
OrgNOCRef: https://rdap.arin.net/registry/entity/IPNOC14-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
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