121.251.36.0/23
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 Center, address: FIT-3-220, Tsinghua Univ address: Beijing 100084, China phone: +86-10-62784301 fax-no: +86-10-62785933 e-mail: abuse@cernet.edu.cn abuse-mailbox: abuse@cernet.edu.cn admin-c: CER-AP tech-c: CER-AP auth: # Filtered remarks: timezone GMT+8 remarks: abuse@cernet.edu.cn was validated on 2026-03-05 mnt-by: MAINT-CERNET-AP last-modified: 2026-03-05T06:39:56Z 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: abuse@cernet.edu.cn admin-c: CER-AP tech-c: CER-AP nic-hdl: AC1685-AP remarks: Generated from irt object IRT-CERNET-AP remarks: abuse@cernet.edu.cn was validated on 2026-03-05 abuse-mailbox: abuse@cernet.edu.cn 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: helpdesk@cernet.edu.cn remarks: abuse@cernet.edu.cn 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: 121.248.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2009-01-05T03:10:57Z source: APNIC
Overlapping Ranges
BGP prefixes that contain 121.251.36.0/23
| 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
No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
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 |
|---|---|---|
| 69.251.251.215 |
7.37ms from Ashburn,
US
|
|
| 68.62.148.103 |
15.99ms from Atlanta,
US
|
|
| 36.140.144.231 |
0.68ms from Beijing,
CN
|
|
| 24.147.19.71 |
8.47ms from Boston,
US
|
|
| 40.70.61.135 |
0.20ms from Boydton,
US
|
|
| 69.133.147.87 |
8.27ms from Charlotte,
US
|
|
| 74.120.170.87 |
0.26ms from Los Angeles,
US
|
|
| 14.61.129.167 |
1.55ms from Seoul,
KR
|
|
| 60.248.23.135 |
2.98ms from Taipei,
TW
|
|
| 23.244.215.119 |
4.36ms from Ashburn,
US
|
|
| 187.77.24.103 |
0.76ms from Boston,
US
|
|
| 24.29.227.71 |
19.33ms from Columbus,
US
|
|
| 78.147.215.231 |
8.74ms from London,
GB
|
|
| 117.223.51.55 |
15.56ms from Mumbai,
IN
|
|
| 85.165.215.71 |
8.29ms from Oslo,
NO
|
|
| 130.35.0.71 |
0.31ms from Phoenix,
US
|
|
| 95.53.89.199 |
18.38ms from Saint Petersburg,
RU
|
|
| 173.239.79.215 |
1.63ms from San Jose,
US
|
|
| 201.74.7.39 |
6.42ms from Sao Paulo,
BR
|
|
| 116.140.116.119 |
11.59ms from Tieling,
CN
|
|
| 61.120.224.71 |
3.83ms from Tokyo,
JP
|
|
| 108.254.103.71 |
8.04ms from Atlanta,
US
|
|
| 45.31.99.231 |
6.63ms from Chicago,
US
|
|
| 217.250.86.23 |
2.12ms from Frankfurt am Main,
DE
|
|
| 79.233.85.199 |
8.53ms from Frankfurt am Main,
DE
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Chennai, IN
What are IP address ranges?
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