Data as of Nov 4, 2026
210.51.48.0/20
No anonymizer space · no proxy exits in 30 daysCHINA UNICOM Industrial Internet Backbone · space held by China Unicom IP network
Announcements
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 210.51.48.0/22 since Aug 2021 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.48.0/24 since Oct 2006 | AS9929 | Internet provider | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.52.0/24 since Aug 2021 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.53.0/24 since Dec 2019 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.54.0/23 since Aug 2021 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.56.0/23 since Aug 2021 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.59.0/24 since Apr 2022 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.60.0/24 since Nov 2020 | AS17621 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.61.0/24 since Aug 2021 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom | |
| 210.51.62.0/23 since Aug 2021 | AS138421 | Hosting | China Unicom IP network via Shanghai Caohejing IDC of China Netcom |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
4,096 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Hosting | 3,584 | 88% | 9 | |
| Internet provider | 512 | 13% | 2 |
Network & registry
Announced by
Covering announcement 210.51.0.0/16
- Prefix
- 210.51.0.0/16
- Announced by
- AS9929 CHINA UNICOM Industrial Internet Backbone
- Type
- Internet provider
- Proxy exits
- 62
- RPKI
- No RPKI
- 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
Who has announced 210.51.0.0/16
210.51.0.0/16
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on 210.51.0.0/16
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS9929 | APNIC | CNC Group CncNet | MAINT-CNCGROUP-RR | Sep 4, 2008 |
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