Data as of Nov 14, 2026
210.51.237.72/29
No anonymizer space · no proxy exits in 30 daysCHINA UNICOM Industrial Internet Backbone · space held by China Unicom IP network
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 210.51.0.0/16 since May 2005 | AS9929 | Internet provider | 61 3 always on | China Unicom IP network |
Network & registry
Announced by
Covering announcement 210.51.192.0/18
- Prefix
- 210.51.192.0/18
- Announced by
- AS9929 CHINA UNICOM Industrial Internet Backbone
- Type
- Internet provider
- RPKI
- RPKI valid
- Netname
- UNICOM-CN
- Registrant
- China Unicom IP network
- RIR
- APNIC
Origin network
AS9929
CN
- Name
- CHINA UNICOM Industrial Internet Backbone
- Type
- Internet provider
- Registered
- Apr 5, 2000
- Domain
- chinaunicom.cn
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
210.51.192.0/18
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 22 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 210.51.192.0/18 | AS9929 | /18 | APNIC | RPKI valid |
IRR
Route objects on 210.51.192.0/18
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS9929 | APNIC | cuii_shanghai | MAINT-CNCGROUP-RR | Aug 23, 2021 |
Whois
Registration for this announcement
- Range
- 210.
51. 0. 0/ 16 - Netname
- UNICOM-CN
- Registrant
- China Unicom IP network
- Registrant country
- CN
- Organization
- China Unicom IP network
- Org country
- CN
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Updated
- Oct 21, 2023
- Maintainer
- APNIC-HM
- RIR
- APNIC
- Country
- CN
- Delegated
- Oct 11, 2000
- Status
- assigned
Report abuse
Abuse contact
- hqs-ipabuse@
chinaunicom. cn - Name
- ABUSE CUCN
- Handle
- AC1718-AP