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 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 121.251.24.0/23
| 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 |
11.05ms 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 |
|---|---|---|
| 52.87.242.23 |
0.53ms from Ashburn,
US
|
|
| 13.92.61.103 |
0.42ms from Ashburn,
US
|
|
| 162.196.174.247 |
9.82ms from Atlanta,
US
|
|
| 181.209.100.119 |
7.79ms from Buenos Aires,
AR
|
|
| 89.239.209.7 |
3.01ms from Copenhagen,
DK
|
|
| 62.248.111.103 |
17.04ms from Istanbul,
TR
|
|
| 176.104.12.7 |
0.48ms from Kyiv,
UA
|
|
| 47.150.153.119 |
3.15ms from Los Angeles,
US
|
|
| 84.100.35.135 |
14.27ms from Lyon,
FR
|
|
| 174.91.193.71 |
1.90ms from Montreal,
CA
|
|
| 89.253.218.199 |
1.22ms from Moscow,
RU
|
|
| 84.142.181.247 |
7.04ms from Nuernberg,
DE
|
|
| 177.43.131.23 |
2.42ms from Osasco,
BR
|
|
| 92.245.150.247 |
0.24ms from Paris,
FR
|
|
| 218.238.31.247 |
1.89ms from Seoul,
KR
|
|
| 18.142.206.103 |
0.13ms from Singapore,
SG
|
|
| 60.113.196.135 |
2.79ms from Tokyo,
JP
|
|
| 126.79.87.7 |
2.52ms from Tokyo,
JP
|
|
| 104.24.177.199 |
0.10ms from Wrocław,
PL
|
|
| 95.110.134.55 |
0.24ms from Arezzo,
IT
|
|
| 54.83.233.39 |
0.55ms from Ashburn,
US
|
|
| 135.18.19.167 |
0.21ms from Boydton,
US
|
|
| 95.69.5.55 |
10.25ms from Braga,
PT
|
|
| 103.217.133.231 |
0.93ms from Delhi,
IN
|
|
| 136.29.27.7 |
15.00ms from Kansas City,
US
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Dushanbe, TJ
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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