121.251.192.0/20
AS4538 · China Education and Research Network Center
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| Country |
China
|
| Domain | cernet.edu.cn |
| ASN | AS4538 |
| Parent Range | 121.248.0.0/14 |
| Registry | APNIC |
| ID | NJR-CERNET |
WHOIS Details
inetnum: 121.248.0.0 - 121.251.255.255 netname: NJR-CERNET descr: China Education and Research Network descr: Nanjing Regional Network country: CN admin-c: CER-AP tech-c: CER-AP abuse-c: AC1685-AP status: ALLOCATED PORTABLE remarks: origin AS4538 remarks: confederation remarks: -------------------------------------------------------- remarks: To report network abuse, please contact mnt-irt remarks: For troubleshooting, please contact tech-c and admin-c remarks: Report invalid contact via www.apnic.net/invalidcontact remarks: -------------------------------------------------------- mnt-by: APNIC-HM mnt-lower: MAINT-CERNET-AP mnt-routes: MAINT-CERNET-AP mnt-irt: IRT-CERNET-AP last-modified: 2020-09-03T09:15:58Z source: APNIC irt: IRT-CERNET-AP address: Network Research Center, address: Main Bldg, 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: http://www.ccert.edu.cn remarks: [email protected] was validated on 2025-08-15 mnt-by: MAINT-CERNET-AP last-modified: 2025-11-18T00:26:28Z source: APNIC role: ABUSE CERNETAP country: ZZ address: Network Research Center, address: Main Bldg, 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 2025-08-15 abuse-mailbox: [email protected] mnt-by: APNIC-ABUSE last-modified: 2025-08-15T09:38:28Z 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: 121.250.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2009-01-05T03:10:57Z source: APNIC
Overlapping Ranges
BGP prefixes that contain 121.251.192.0/20
| Range | ASN | Company | Num of IPs |
|---|---|---|---|
| 121.248.0.0/14 | AS4538 | China Education and Research Network | 262,144 |
Nearby Ranges
BGP prefixes that overlap with 121.251.0.0/16
| Range | ASN | Company | Num of IPs |
|---|---|---|---|
| 121.248.0.0/14 | AS4538 | China Education and Research Network | 262,144 |
Hosted domains
There are no domains currently hosted on this ASN.
Hosted domains API
Pingable IPs
4 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.251.192.8 |
13.52ms from Qingdao,
CN
|
|
| 121.251.193.9 |
16.64ms from Qingdao,
CN
|
Other Pingable IPs
Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.
| IP Address | ASN | Details |
|---|---|---|
| 80.107.203.244 |
0.68ms from Athens,
GR
|
|
| 108.193.133.20 |
3.03ms from Atlanta,
US
|
|
| 213.118.162.116 |
8.27ms from Brussels,
BE
|
|
| 62.246.88.68 |
4.70ms from Duesseldorf,
DE
|
|
| 217.231.106.20 |
6.43ms from Duesseldorf,
DE
|
|
| 46.35.63.20 |
8.56ms from Frankfurt am Main,
DE
|
|
| 3.123.36.52 |
0.12ms from Frankfurt am Main,
DE
|
|
| 87.168.15.164 |
5.47ms from Frankfurt am Main,
DE
|
|
| 117.25.153.4 |
5.24ms from Fuzhou,
CN
|
|
| 5.70.149.100 |
13.30ms from London,
GB
|
|
| 27.207.43.52 |
7.87ms from Qingdao,
CN
|
|
| 95.161.97.196 |
0.27ms from Saint Petersburg,
RU
|
|
| 4.203.153.4 |
0.23ms from Sao Paulo,
BR
|
|
| 211.193.3.52 |
1.37ms from Seoul,
KR
|
|
| 114.201.142.132 |
1.52ms from Seoul,
KR
|
|
| 87.215.14.228 |
4.01ms from Amsterdam,
NL
|
|
| 4.227.180.228 |
0.45ms from Ashburn,
US
|
|
| 189.9.32.4 |
0.57ms from Brasilia,
BR
|
|
| 78.141.71.244 |
7.55ms from Bratislava,
SK
|
|
| 110.52.118.4 |
3.82ms from Changsha,
CN
|
|
| 5.30.194.20 |
3.27ms from Dubai,
AE
|
|
| 34.254.118.148 |
0.20ms from Dublin,
IE
|
|
| 87.244.129.244 |
7.98ms from Kyiv,
UA
|
|
| 81.100.53.180 |
8.69ms from London,
GB
|
|
| 50.7.48.4 |
0.58ms from Miami,
US
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Reims, FR
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