Data as of Nov 8, 2026
121.194.0.0/20
No anonymizer space · no proxy exits in 30 daysChina Education and Research Network Center · space held by China Education and Research Network
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Recent change
New origin Sep 18, 2026
from AS4538 China Education and Research Network Center
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 121.194.0.0/15 since Oct 2006 | AS4538 | Business | 30 | China Education and Research Network | |
| 121.192.0.0/14 since Nov 2017 | AS4538 | Business | 84 2 always on |
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 121.194.4.0/24 | AS4538 | Business | China Education and Research Network |
Network & registry
Origin network
AS4538
CN
- Name
- China Education and Research Network Center
- Type
- Education
- Registered
- Aug 1, 2002
- Domain
- cernet.edu.cn
- Website
- www.edu.cn
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2007
- Current origin since
- Sep 18, 2026 · 2 mo
- Origin networks
- 1
IRR
Route objects on the exact prefix
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 121.194.8.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.8.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
| 121.194.9.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.9.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
| 121.194.10.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.10.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
| 121.194.11.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.11.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
| 121.194.12.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.12.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
| 121.194.13.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.13.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
| 121.194.14.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.14.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
| 121.194.15.0/24 | AS4538 | RADB | CMI (Customer Route) | MAINT-AS58453 | Nov 13, 2023 |
| 121.194.15.0/24 | AS4538 | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK | May 25, 2016 |
Whois
Registration for this announcement
- Range
- 121.
194. 0. 0/ 15 - Netname
- BJR-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
- Jul 17, 2006
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cernet. edu. cn - Name
- ABUSE CERNETAP
- Handle
- AC1685-AP