Data as of Nov 11, 2026
210.51.243.0/24
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 |
|---|---|---|---|---|---|
| 210.51.192.0/18 since May 2005 | AS9929 | Internet provider | China Unicom IP network | ||
| 210.51.0.0/16 since May 2005 | AS9929 | Internet provider | 63 2 always on | China Unicom IP network |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 210.51.0.0/16 | 65,536 | UNICOM-CN | China Unicom IP network | ALLOCATED PORTABLE | — | hqs-ipabuse@ |
| └ 210.51.243.0/25 | 128 | nanjing-IP-pool | nanjing city | ASSIGNED NON-PORTABLE | — | hqs-ipabuse@ via UNICOM-CN |
| └ 210.51.243.128/25 | 128 | nanjing-IP-pool | nanjing city | ASSIGNED NON-PORTABLE | — | hqs-ipabuse@ via UNICOM-CN |
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
Announced by
Covering announcement 210.51.242.0/23
- Prefix
- 210.51.242.0/23
- 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
210.51.242.0/23
Routing history
- Pattern
- Stable
- First seen
- Jul 2024
- Current origin since
- Jul 2024 · 2.4 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 210.51.242.0/23 | AS9929 | /23 | APNIC | RPKI valid |
| 210.51.192.0/18 | AS9929 | /18 | APNIC | Too specific |
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