121.250.16.0/21
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 121.250.16.0/21
| 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 121.250.0.0/16
| 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
38 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.250.23.5 |
6.85ms from Qingdao,
CN
|
|
| 121.250.18.117 |
6.86ms 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 |
|---|---|---|
| 34.14.71.229 |
0.17ms from Brussels,
BE
|
|
| 104.138.143.213 |
7.32ms from Charlotte,
US
|
|
| 211.149.132.21 |
3.81ms from Chengdu,
CN
|
|
| 218.248.98.149 |
6.37ms from Chennai,
IN
|
|
| 24.209.43.37 |
14.04ms from Cleveland,
US
|
|
| 23.247.148.5 |
3.89ms from Detroit,
US
|
|
| 193.16.39.5 |
0.77ms from Duesseldorf,
DE
|
|
| 89.146.237.101 |
0.79ms from Frankfurt am Main,
DE
|
|
| 189.226.63.165 |
1.15ms from Mexico City,
MX
|
|
| 80.17.155.181 |
5.74ms from Milan,
IT
|
|
| 121.84.129.69 |
2.08ms from Osaka,
JP
|
|
| 114.188.108.213 |
5.38ms from Osaka,
JP
|
|
| 203.192.130.213 |
1.44ms from Perth,
AU
|
|
| 177.148.96.117 |
4.64ms from Rio de Janeiro,
BR
|
|
| 51.38.206.133 |
0.08ms from Strasbourg,
FR
|
|
| 175.151.87.245 |
2.31ms from Tieling,
CN
|
|
| 212.108.53.5 |
7.36ms from Vienna,
AT
|
|
| 212.85.198.213 |
0.34ms from Accra,
GH
|
|
| 221.192.14.21 |
8.99ms from Beijing,
CN
|
|
| 108.177.8.5 |
6.29ms from Dallas,
US
|
|
| 150.239.178.181 |
0.94ms from Dallas,
US
|
|
| 217.110.181.85 |
0.45ms from Frankfurt am Main,
DE
|
|
| 14.172.31.101 |
2.33ms from Ho Chi Minh City,
VN
|
|
| 219.149.101.229 |
4.20ms from Liaoyang,
CN
|
|
| 62.6.158.197 |
2.17ms from London,
GB
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Freeport, BS
What are IP address ranges?
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