121.251.24.0/23
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 121.251.24.0/23
| 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 is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.
| IP Address | Domain | Domains on this IP |
|---|---|---|
| 121.251.24.249 | ahbvc.edu.cn | 1 |
Hosted domains API
Pingable IPs
18 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.251.24.11 |
11.13ms from Shanghai,
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 |
|---|---|---|
| 165.1.205.183 |
0.45ms from Ashburn,
US
|
|
| 181.58.6.119 |
13.57ms from Bogota,
CO
|
|
| 223.235.112.39 |
1.85ms from Kolkata,
IN
|
|
| 221.103.54.71 |
4.55ms from Osaka,
JP
|
|
| 75.174.173.87 |
10.72ms from Seattle,
US
|
|
| 27.234.111.167 |
2.10ms from Seoul,
KR
|
|
| 39.116.176.183 |
5.30ms from Seoul,
KR
|
|
| 47.107.223.247 |
1.58ms from Shenzhen,
CN
|
|
| 119.127.105.183 |
2.29ms from Shenzhen,
CN
|
|
| 111.89.137.87 |
0.74ms from Tokyo,
JP
|
|
| 119.244.192.199 |
5.66ms from Tokyo,
JP
|
|
| 20.107.47.135 |
0.24ms from Amsterdam,
NL
|
|
| 40.121.196.167 |
0.42ms from Ashburn,
US
|
|
| 35.84.122.23 |
0.17ms from Boardman,
US
|
|
| 109.134.119.7 |
1.01ms from Brussels,
BE
|
|
| 98.11.42.23 |
19.12ms from Chicago,
US
|
|
| 40.143.33.103 |
1.15ms from Durham,
US
|
|
| 46.92.146.215 |
2.66ms from Frankfurt am Main,
DE
|
|
| 85.215.59.135 |
0.59ms from Frankfurt am Main,
DE
|
|
| 185.166.175.103 |
0.57ms from Madrid,
ES
|
|
| 95.247.62.55 |
4.69ms from Milan,
IT
|
|
| 216.221.104.103 |
16.80ms from Minneapolis,
US
|
|
| 23.14.60.7 |
0.45ms from Mumbai,
IN
|
|
| 187.116.67.119 |
1.61ms from Osasco,
BR
|
|
| 79.12.165.103 |
15.70ms from Rome,
IT
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Draper, US
What are IP address ranges?
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
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