Data as of Nov 11, 2026

121.243.0.0/21

No anonymizer space · no proxy exits in 30 days

TATA Communications formerly VSNL is Leading ISP · space held by Tata Communications Limited

Announcement

this exact prefix

RPKI valid

Announced by

AS4755

Type

Business

63% of it

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Proxy exits	Holder	RPKI
121.243.0.0/17 since Jun 2009	AS4755	Business	12	Tata Communications Limited

More specific

Announcements inside

Prefix	Origin	Type	Holder
121.243.2.0/24 since Aug 2016	AS4755	Internet provider	Tata Communications Limited
121.243.3.0/24 since Aug 2016	AS4755	Internet provider	Tata Communications Limited
121.243.5.0/24 since Jul 2020	AS4755	Internet provider	Tata Communications Limited

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

2,048 addresses

Type	Addresses	Share	Ranges
Business	1,280	63%	3
Internet provider	768	38%	3

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern: Stable
First seen: Jul 2007
Current origin since: Jul 2007 · 19 yr
Origin networks: 1

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
121.243.0.0/21	AS4755	/21	APNIC	RPKI valid
121.243.0.0/17	AS4755	/17	APNIC	Too specific

IRR

Route objects on the exact prefix

Origin	Registry	Description	Maintainer	Modified
AS4755	RADB	VSNL Route Object	MAINT-VSNL-IN	Nov 13, 2023