121.251.240.0/20
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: 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: http://www.ccert.edu.cn remarks: abuse@cernet.edu.cn 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: 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 2025-08-15 abuse-mailbox: abuse@cernet.edu.cn 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: 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: 121.250.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2009-01-05T03:10:57Z source: APNIC
Overlapping Ranges
BGP prefixes that contain 121.251.240.0/20
| 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 3 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.
| IP Address | Domain | Domains on this IP |
|---|---|---|
| 121.251.249.56 | xn--rhqt5terbz9c297aqeam82d.com | 2 |
| 121.251.249.55 | xn--cesx9m.club | 1 |
Hosted domains API
Pingable IPs
26 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.251.251.248 |
1.53ms from Qingdao,
CN
|
|
| 121.251.248.13 |
15.32ms from Beijing,
CN
|
|
| 121.251.255.38 |
15.21ms from Beijing,
CN
|
|
| 121.251.253.201 |
16.20ms from Beijing,
CN
|
|
| 121.251.249.56 |
15.24ms from Beijing,
CN
|
|
| 121.251.252.101 |
15.50ms from Beijing,
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 |
|---|---|---|
| 108.18.98.68 |
2.53ms from Ashburn,
US
|
|
| 52.149.132.244 |
0.41ms from Ashburn,
US
|
|
| 203.109.179.36 |
0.17ms from Auckland,
NZ
|
|
| 34.211.198.4 |
0.11ms from Boardman,
US
|
|
| 135.131.135.196 |
7.75ms from Chicago,
US
|
|
| 97.99.102.4 |
5.24ms from Dallas,
US
|
|
| 82.198.219.228 |
2.51ms from Hamburg,
DE
|
|
| 218.75.22.212 |
9.61ms from Hangzhou,
CN
|
|
| 204.1.25.132 |
0.86ms from Jacksonville,
US
|
|
| 95.176.212.4 |
0.76ms from Ljubljana,
SI
|
|
| 138.38.31.20 |
9.30ms from London,
GB
|
|
| 60.130.201.36 |
3.77ms from Osaka,
JP
|
|
| 125.92.206.84 |
2.52ms from Shenzhen,
CN
|
|
| 126.36.100.20 |
4.66ms from Tokyo,
JP
|
|
| 189.27.81.100 |
4.56ms from Brasilia,
BR
|
|
| 129.128.252.148 |
5.49ms from Calgary,
CA
|
|
| 209.120.240.228 |
0.14ms from Dallas,
US
|
|
| 14.175.16.212 |
3.21ms from Hanoi,
VN
|
|
| 49.249.203.116 |
1.62ms from Mumbai,
IN
|
|
| 119.229.147.52 |
1.43ms from Osaka,
JP
|
|
| 92.203.220.132 |
1.54ms from Osaka,
JP
|
|
| 177.215.65.20 |
1.20ms from Osasco,
BR
|
|
| 124.129.59.100 |
1.11ms from Qingdao,
CN
|
|
| 150.138.108.116 |
1.56ms from Qingdao,
CN
|
|
| 100.53.191.228 |
0.48ms from Reston,
US
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Beijing, CN
What are IP address ranges?
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