Data as of Nov 5, 2026
221.199.40.216/30
No anonymizer space · no proxy exits in 30 daysCHINA UNICOM China169 Backbone · space held by China Unicom Ningxia province network
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 221.199.0.0/17 since Feb 2006 | AS4837 | Residential | 44 2 always on | China Unicom Ningxia province 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 |
|---|---|---|---|---|---|---|
| 221.199.0.0/17 | 32,768 | UNICOM-NX | China Unicom Ningxia province network | ALLOCATED PORTABLE | — | hqs-ipabuse@ |
| └ 221.199.40.216/30 | 4 | NX-WZ-Ningxia-electric-power-Yinnan-power-supply-office | unknown | ASSIGNED NON-PORTABLE | — | hqs-ipabuse@ via UNICOM-NX |
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 221.199.32.0/20
- Prefix
- 221.199.32.0/20
- Announced by
- AS4837 CHINA UNICOM China169 Backbone
- Type
- Residential
- Proxy exits
- 5
- Always-on exits
- 1
- RPKI
- RPKI valid
- Netname
- UNICOM-NX
- Registrant
- China Unicom Ningxia province network
- RIR
- APNIC
Origin network
AS4837
CN
- Name
- CHINA UNICOM China169 Backbone
- Type
- Internet provider
- Registered
- Sep 17, 2001
- Domain
- chinaunicom.cn
- Website
- www.chinaunicom.cn/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
221.199.32.0/20
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 221.199.32.0/20 | AS4837 | /20 | APNIC | RPKI valid |
| 221.199.0.0/17 | AS4837 | /17 | APNIC | Too specific |
Whois
Registration for this announcement
- Range
- 221.
199. 0. 0/ 17 - Netname
- UNICOM-NX
- Registrant
- China Unicom Ningxia province network
- Registrant country
- CN
- Organization
- China Unicom Ningxia province 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
- Jun 30, 2003
- Status
- assigned
Report abuse
Abuse contact
- hqs-ipabuse@
chinaunicom. cn - Name
- ABUSE CUCN
- Handle
- AC1718-AP