Summary
| Country |
 China
|
| Domain | cernet.net |
| Size | 2,048 |
| Registry | APNIC |
| Network Name | BJR-CERNET |
Whois
inetnum: 121.193.0.0 - 121.193.255.255
netname: BJR-CERNET
descr: China Education and Research Network
descr: Beijing Regional Network
country: CN
admin-c: CER-AP
tech-c: CER-AP
abuse-c: AC1685-AP
status: ALLOCATED PORTABLE
remarks: origin AS4538
remarks: confederation
mnt-by: APNIC-HM
mnt-lower: MAINT-CERNET-AP
mnt-routes: MAINT-CERNET-AP
mnt-irt: IRT-CERNET-AP
last-modified: 2020-09-03T09:16:09Z
source: APNIC
irt: IRT-CERNET-AP
address: Network Center,
address: FIT-3-220, Tsinghua Univ
address: Beijing 100084, China
phone: +86-10-62784301
fax-no: +86-10-62785933
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: CER-AP
tech-c: CER-AP
auth: # Filtered
remarks: timezone GMT+8
remarks: [email protected] was validated on 2026-03-05
mnt-by: MAINT-CERNET-AP
last-modified: 2026-05-25T09:07:47Z
source: APNIC
role: ABUSE CERNETAP
country: ZZ
address: Network Center,
address: FIT-3-220, Tsinghua Univ
address: Beijing 100084, China
phone: +86-10-62784301
e-mail: [email protected]
admin-c: CER-AP
tech-c: CER-AP
nic-hdl: AC1685-AP
remarks: Generated from irt object IRT-CERNET-AP
remarks: [email protected] was validated on 2026-03-05
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2026-03-05T06:40:20Z
source: APNIC
role: CERNET Helpdesk
address: CERNET Center
address: Beijing 100084, China
country: CN
phone: +86-10-6278-4049
fax-no: +86-10-6278-5933
e-mail: [email protected]
remarks: [email protected]
admin-c: XL1-CN
tech-c: SZ2-AP
nic-hdl: CER-AP
mnt-by: MAINT-CERNET-AP
last-modified: 2020-09-03T09:14:12Z
source: APNIC
route: 121.193.0.0/16
descr: CERNET
origin: AS4538
mnt-by: MAINT-CERNET-AP
last-modified: 2009-01-05T03:10:57Z
source: APNICCIDR IP address subranges within 121.193.240.0/21 subnet
- 121.193.240.0/24
- 121.193.241.0/24
- 121.193.242.0/24
- 121.193.243.0/24
- 121.193.244.0/24
- 121.193.245.0/24
- 121.193.246.0/24
- 121.193.247.0/24