Data as of Nov 6, 2026
42.245.208.0/20
No anonymizer space · no proxy exits in 30 daysCERNET New Technology Co., Ltd · space held by China Education and Research Network
Announced by
Type
Business
Recent change
New origin Sep 18, 2026
from AS133111 CERNET New Technology Co., Ltd, after 2.5 years unannounced
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 42.245.0.0/16 since Sep 18, 2026 | AS4538 | Business | China Education and Research Network |
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 42.245.221.0/24 since Feb 2023 | AS133111 | Business | China Education and Research 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 |
|---|---|---|---|---|---|---|
| 42.244.0.0/14 | 262,144 | NJR-CERNET | China Education and Research Network | ALLOCATED PORTABLE | — | abuse@ |
| └ 42.245.208.0/20 | 4,096 | SNDXTC-CN | ~{H|6{PB<<Ju~} | ASSIGNED NON-PORTABLE | — | abuse@ |
Network & registry
Announced by
Covering announcement 42.245.192.0/18
- Prefix
- 42.245.192.0/18
- Announced by
- AS133111 CERNET New Technology Co., Ltd
- Type
- Business
- RPKI
- No RPKI
- Netname
- NJR-CERNET
- Registrant
- China Education and Research Network
- RIR
- APNIC
Origin network
AS133111
CN
- Name
- CERNET New Technology Co., Ltd
- Type
- Education
- Registered
- Oct 8, 2013
- Domain
- cernet.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
42.245.192.0/18
Routing history
- Pattern
- Stable
- First seen
- Jan 2024
- Current origin since
- Sep 18, 2026 · 2 mo
- Origin networks
- 1
IRR
Route objects on 42.245.192.0/18
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS133111 | APNIC | CERNET Newtech | MAINT-CERNET-AP | Mar 14, 2017 |
Whois
Registration for this announcement
- Range
- 42.
244. 0. 0/ 14 - Netname
- NJR-CERNET
- Registrant
- China Education and Research Network
- Registrant country
- CN
- Organization
- China Education and Research Network
- Org country
- CN
- Type
- ALLOCATED PORTABLE
- Created
- Not stated by the registry
- Updated
- Sep 3, 2020
- Maintainer
- APNIC-HM
- RIR
- APNIC
- Country
- CN
- Delegated
- Mar 18, 2011
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cernet. edu. cn - Name
- ABUSE CERNETAP
- Handle
- AC1685-AP