Data as of Nov 10, 2026
221.239.23.0/24
No anonymizer space · no proxy exits in 30 daysASN for TIANJIN Provincial Net of CT · space held by Chinanet Tianjin Province Network
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 221.239.0.0/18 since May 2005 | AS17638 | Residential | 17 1 always on | Chinanet Tianjin Province Network |
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.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 221. | 98,304 | CHINANET-TJ | Chinanet Tianjin Province Network | ALLOCATED PORTABLE | — | anti-spam@ |
| └ 221.239.23.128/26 | 64 | TIANJIN-TIANXINGWUYE-LTD | unknown | ASSIGNED NON-PORTABLE | — | anti-spam@ via CHINANET-TJ |
| └ 221.239.23.192/26 | 64 | TIANJIN-DINGSHENGWANGLUO-LTD | DINGSHENGWANGLUO-LTD. | ASSIGNED NON-PORTABLE | — | anti-spam@ via CHINANET-TJ |
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
Origin network
AS17638
CN
- Name
- ASN for TIANJIN Provincial Net of CT
- Type
- Internet provider
- Registered
- Nov 18, 2002
- Domain
- cndata.com
- Industry
- Computer and Information Technology
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2014
- Current origin since
- Oct 2014 · 12 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 221.239.23.0/24 | AS17638 | /24 | APNIC | RPKI valid |
| 221.239.0.0/18 | AS17638 | /18 | APNIC | Too specific |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS17638 | RADB | ASN for TIANJIN Provincial Net of CT | MAINT-CT-GNOC | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 221.
238. 0. 0 - 221. 239. 127. 255 - Netname
- CHINANET-TJ
- Registrant
- Chinanet Tianjin Province Network
- Registrant country
- CN
- Organization
- Chinanet Tianjin Province Network
- Org country
- CN
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Updated
- Jun 15, 2021
- Maintainer
- APNIC-HM
- RIR
- APNIC
- Country
- CN
- Delegated
- Sep 30, 2003
- Status
- assigned
Report abuse
Abuse contact
- anti-spam@
chinatelecom. cn - Name
- ABUSE CHINANETCN
- Handle
- AC1573-AP