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Data as of Nov 4, 2026

210.51.36.0/28

No anonymizer space · no proxy exits in 30 days

China Unicom · space held by China Unicom IP network

Announcement
210.51.36.0/24
RPKI valid
Announced by
AS138421
Type
Hosting
Risk
50 / 100 · Medium

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
210.51.36.0/22
since Aug 2021
AS138421HostingChina Unicom IP network
via Shanghai Caohejing IDC of China Netcom
210.51.0.0/16
since May 2005
AS9929Internet provider62China Unicom IP network

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
210.51.0.0/1665,536UNICOM-CNChina Unicom IP networkALLOCATED PORTABLE—hqs-ipabuse@chinaunicom.cn
└ 210.51.20.0 - 210.51.63.25511,264CNC-SH-IDCShanghai Caohejing IDC of China NetcomALLOCATED NON-PORTABLE—hqs-ipabuse@chinaunicom.cn
via UNICOM-CN
└ 210.51.36.0/2816zhuyuan-travel-agencyshanghai cityASSIGNED NON-PORTABLE—hqs-ipabuse@chinaunicom.cn
via CNC-SH-IDC

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 210.51.36.0/24

Prefix
210.51.36.0/24
Announced by
AS138421 China Unicom
Type
Hosting
RPKI
RPKI valid
Netname
CNC-SH-IDC
Registrant
Shanghai Caohejing IDC of China Netcom
RIR
APNIC
Registry

Holder

Organization
China Unicom IP network
Range
210.51.0.0/16
Registration type
ALLOCATED PORTABLE
Reallocated to
Shanghai Caohejing IDC of China Netcom
Reallocated range
210.51.20.0 - 210.51.63.255
Reallocation type
ALLOCATED NON-PORTABLE
Origin network

AS138421

CN
Name
China Unicom
Type
Hosting
Registered
Nov 13, 2018
Domain
chinaunicom.cn
Industry
Media, Publishing, and Broadcasting
Spamhaus ASN-DROP
not listed