Sign in Get started

Data as of Nov 7, 2026

120.133.252.0/22

No anonymizer space · no proxy exits in 30 days

21Vianet.Co.,Ltd · space held by 21ViaNet(China),Inc.

Announcement

this exact prefix

RPKI valid

Announced by

Type

Hosting

Risk

50 / 100 · Medium

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Proxy exits	Holder	RPKI
120.133.0.0/16 since May 2017	AS23724	Hosting	3	21ViaNet(China),Inc.

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Origin network

AS17428

CN

Name: 21Vianet.Co.,Ltd
Type: Hosting
Registered: Oct 19, 2000
Domain: 21vianet.com
Website: www.en.21vianet.com
Industry: Software Development
Spamhaus ASN-DROP: not listed

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
120.133.240.0/20	AS4811	/32	APNIC	Another network
120.133.240.0/20	AS9308	/32	APNIC	Another network
120.133.240.0/20	AS9802	/32	APNIC	Another network
120.133.240.0/20	AS17428	/32	APNIC	RPKI valid
120.133.240.0/20	AS17621	/32	APNIC	Another network
120.133.240.0/20	AS18244	/32	APNIC	Another network
120.133.240.0/20	AS24400	/32	APNIC	Another network
120.133.240.0/20	AS59020	/32	APNIC	Another network

IRR

Route objects on the exact prefix

Origin	Registry	Description	Maintainer	Modified
AS17428	RADB	Proxy-registered route object	MAINT-HGC-INTL	Oct 2, 2026

IRR inside

Route objects inside

Prefix	Origin	Registry	Description	Maintainer	Modified
120.133.252.0/23	AS17428	RADB	Proxy-registered route object	MAINT-HGC-INTL	Oct 2, 2026
120.133.252.0/24	AS17428	RADB	Proxy-registered route object	MAINT-HGC-INTL	Oct 2, 2026
120.133.253.0/24	AS17428	RADB	Proxy-registered route object	MAINT-HGC-INTL	Oct 2, 2026
120.133.254.0/23	AS17428	RADB	Proxy-registered route object	MAINT-HGC-INTL	Oct 2, 2026
120.133.254.0/24	AS17428	RADB	Proxy-registered route object	MAINT-HGC-INTL	Oct 2, 2026
120.133.255.0/24	AS17428	RADB	Proxy-registered route object	MAINT-HGC-INTL	Oct 2, 2026