202.121.128.0/20
AS4538 · China Education and Research Network Center
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| Country |
China
|
| Domain | cernet.edu.cn |
| ASN | AS4538 |
| Registry | APNIC |
| ID | CERNET-CN |
WHOIS Details
inetnum: 202.112.0.0 - 202.121.255.255 netname: CERNET-CN descr: China Education and Research Network descr: China Education and Research Network Center descr: Tsinghua University descr: Beijing, 100084 country: CN admin-c: CER-AP tech-c: CER-AP abuse-c: AC1685-AP status: ALLOCATED PORTABLE remarks: origin AS4538 mnt-by: APNIC-HM mnt-lower: MAINT-CERNET-AP mnt-routes: MAINT-CERNET-AP mnt-irt: IRT-CERNET-AP last-modified: 2020-09-03T09:16:29Z 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
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 |
|---|---|---|
| 202.121.140.183 | sufe.edu.cn | 2 |
Hosted domains API
Pingable IPs
384 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 202.121.129.231 |
2.41ms from Shanghai,
CN
|
|
| 202.121.140.49 |
2.37ms from Shanghai,
CN
|
|
| 202.121.138.2 |
2.31ms from Shanghai,
CN
|
|
| 202.121.142.100 |
2.53ms from Shanghai,
CN
|
|
| 202.121.135.198 |
3.64ms from Shanghai,
CN
|
|
| 202.121.141.18 |
2.32ms 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 |
|---|---|---|
| 20.237.15.84 |
0.43ms from Ashburn,
US
|
|
| 13.59.38.116 |
0.16ms from Columbus,
US
|
|
| 87.58.44.132 |
2.56ms from Copenhagen,
DK
|
|
| 113.66.37.20 |
2.55ms from Guangzhou,
CN
|
|
| 46.174.254.52 |
6.12ms from Krasnoyarsk,
RU
|
|
| 158.110.199.244 |
5.53ms from Milan,
IT
|
|
| 108.189.18.36 |
8.93ms from Orlando,
US
|
|
| 60.91.52.228 |
3.86ms from Osaka,
JP
|
|
| 39.76.187.244 |
5.31ms from Qingdao,
CN
|
|
| 60.217.62.132 |
7.11ms from Qingdao,
CN
|
|
| 3.235.186.52 |
0.36ms from Reston,
US
|
|
| 210.101.100.180 |
3.25ms from Seoul,
KR
|
|
| 140.118.104.164 |
1.76ms from Taipei,
TW
|
|
| 77.125.166.148 |
1.15ms from Tel Aviv,
IL
|
|
| 221.115.191.4 |
1.27ms from Tokyo,
JP
|
|
| 20.220.148.148 |
0.15ms from Toronto,
CA
|
|
| 5.195.174.132 |
0.32ms from Al Fujairah City,
AE
|
|
| 174.98.164.180 |
15.93ms from Chicago,
US
|
|
| 23.112.251.20 |
4.68ms from Chicago,
US
|
|
| 86.132.230.68 |
5.78ms from London,
GB
|
|
| 35.211.37.148 |
0.14ms from Moncks Corner,
US
|
|
| 60.150.183.68 |
3.69ms from Osaka,
JP
|
|
| 211.225.164.116 |
4.69ms from Seoul,
KR
|
|
| 222.237.24.148 |
1.33ms from Seoul,
KR
|
|
| 192.176.1.212 |
0.65ms from Stockholm,
SE
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Bucharest, RO
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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