202.121.20.0/22
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 no domains currently hosted on this ASN.
Hosted domains API
Pingable IPs
7 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 202.121.21.252 |
2.94ms 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 |
|---|---|---|
| 2.84.51.118 |
0.99ms from Athens,
GR
|
|
| 202.28.39.6 |
12.90ms from Bangkok,
TH
|
|
| 75.11.236.118 |
2.81ms from Dallas,
US
|
|
| 168.222.44.86 |
0.38ms from Frankfurt am Main,
DE
|
|
| 154.218.17.166 |
0.07ms from Gdynia,
PL
|
|
| 81.71.137.6 |
2.04ms from Guangzhou,
CN
|
|
| 89.169.96.246 |
1.05ms from Helsinki,
FI
|
|
| 86.60.233.246 |
2.62ms from Helsinki,
FI
|
|
| 70.238.234.38 |
3.26ms from Houston,
US
|
|
| 119.189.107.230 |
4.91ms from Jinan,
CN
|
|
| 109.108.71.22 |
0.43ms from Kyiv,
UA
|
|
| 54.207.27.102 |
0.16ms from Osasco,
BR
|
|
| 1.213.24.102 |
1.70ms from Seoul,
KR
|
|
| 60.68.168.214 |
2.90ms from Tokyo,
JP
|
|
| 75.17.106.182 |
12.50ms from Atlanta,
US
|
|
| 69.58.92.86 |
0.06ms from Beauharnois,
CA
|
|
| 34.221.93.22 |
0.16ms from Boardman,
US
|
|
| 95.105.218.22 |
6.18ms from Bratislava,
SK
|
|
| 107.12.211.70 |
17.66ms from Charlotte,
US
|
|
| 216.161.127.166 |
9.41ms from Chicago,
US
|
|
| 61.128.249.102 |
1.46ms from Chongqing,
CN
|
|
| 34.55.128.38 |
0.11ms from Council Bluffs,
US
|
|
| 54.75.30.86 |
0.20ms from Dublin,
IE
|
|
| 50.185.69.6 |
11.89ms from Flint,
US
|
|
| 36.248.116.230 |
5.63ms from Fuzhou,
CN
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Lanzhou, CN
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.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.
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