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Data as of Nov 8, 2026

210.21.237.0/24

No anonymizer space · no proxy exits in 30 days

China Unicom Shenzen network · space held by China Unicom IP network

Announcement
this exact prefix
RPKI valid
Announced by
AS17623
Type
Residential
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
210.21.192.0/18
since May 2005
AS17623Residential25
1 always on
China Unicom IP network
via shenzhen branch, china netcom corp

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
210.21.0.0 - 210.22.255.255131,072UNICOM-CNChina Unicom IP networkALLOCATED PORTABLE—hqs-ipabuse@chinaunicom.cn
└ 210.21.0.0/1665,536UNICOM-CNChina Unicom IP networkASSIGNED NON-PORTABLE—hqs-ipabuse@chinaunicom.cn
└ 210.21.192.0/1816,384SHENZHEN-CNCshenzhen branch, china netcom corpALLOCATED NON-PORTABLE—hqs-ipabuse@chinaunicom.cn
via UNICOM-CN
└ 210.21.237.0/24256ZHAOSHANGTIANYUZhaoshangtianyuASSIGNED NON-PORTABLE—hqs-ipabuse@chinaunicom.cn
via SHENZHEN-CNC

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
IPv4 market

Holder

Holder in the market →
Organization
China Unicom IP network
Range
210.21.0.0 - 210.22.255.255
Registration type
ALLOCATED PORTABLE
Reallocated to
shenzhen branch, china netcom corp
Reallocated range
210.21.192.0/18
Reallocation type
ALLOCATED NON-PORTABLE
Origin network

AS17623

CN
Name
China Unicom Shenzen network
Type
Internet provider
Registered
Jan 18, 2001
Domain
chinaunicom.cn
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed