Data as of Nov 3, 2026
123.151.0.0/21
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 |
|---|---|---|---|---|---|
| 123.151.0.0/17 since Sep 2010 | AS17638 | Residential | 10 | Chinanet Tianjin Province Network | |
| 123.151.0.0/16 since Apr 2008 | AS17638 | Residential | 22 | Chinanet Tianjin Province Network | |
| 123.150.0.0/15 since Mar 2007 | AS17638 | Residential | 175 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 |
|---|---|---|---|---|---|---|
| 123.150.0.0/15 | 131,072 | CHINANET-TJ | Chinanet Tianjin Province Network | ALLOCATED PORTABLE | — | [email protected] |
| └ 123.151.0.0/20 | 4,096 | TIANJIN-DINGSHENG-LTD | unknown | ASSIGNED NON-PORTABLE | — | [email protected] 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
Registry
Holder
- Organization
- Chinanet Tianjin Province Network
- Range
- 123.150.0.0/15
- Registration type
- ALLOCATED PORTABLE
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 |
|---|---|---|---|---|
| 123.151.0.0/21 | AS17638 | /21 | APNIC | RPKI valid |
| 123.151.0.0/17 | AS17638 | /17 | 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
- 123.151.0.0/20
- Netname
- TIANJIN-DINGSHENG-LTD
- Registrant country
- CN
- Organization
- Not stated by the registry
- Type
- ASSIGNED NON-PORTABLE
- Created
- Not stated by the registry
- Updated
- Sep 4, 2008
- Maintainer
- MAINT-CHINANET-TJ
- RIR
- APNIC
- Country
- CN
- Delegated
- Feb 28, 2007
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- ABUSE CHINANETCN
- Handle
- AC1573-AP