202.203.136.0/21
AS4538 · China Education and Research Network Center
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| Country |
China
|
| Domain | cernet.edu.cn |
| ASN | AS4538 |
| Registry | APNIC |
| ID | CDR-CERNET |
WHOIS Details
inetnum: 202.202.0.0 - 202.203.255.255 netname: CDR-CERNET descr: China Education and Research Network descr: Chengdu Regional Network country: CN admin-c: CER-AP tech-c: CER-AP abuse-c: AC1685-AP status: ASSIGNED NON-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: 2021-03-24T13:05:10Z 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: 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: http://www.ccert.edu.cn remarks: abuse@cernet.edu.cn 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: 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 2025-08-15 abuse-mailbox: abuse@cernet.edu.cn 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: 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
Hosted domains
There are no domains currently hosted on this ASN.
Hosted domains API
Pingable IPs
No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
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 |
|---|---|---|
| 213.218.243.213 |
0.34ms from Amsterdam,
NL
|
|
| 34.220.50.213 |
0.52ms from Boardman,
US
|
|
| 89.180.68.165 |
12.68ms from Braga,
PT
|
|
| 134.155.200.53 |
5.02ms from Frankfurt am Main,
DE
|
|
| 102.64.23.53 |
9.25ms from Johannesburg,
ZA
|
|
| 82.28.193.149 |
15.03ms from London,
GB
|
|
| 82.16.62.117 |
5.22ms from London,
GB
|
|
| 70.151.137.149 |
1.42ms from Miami,
US
|
|
| 71.24.238.149 |
7.55ms from Minneapolis,
US
|
|
| 5.16.45.101 |
1.87ms from Saint Petersburg,
RU
|
|
| 35.190.85.117 |
0.09ms from Santiago de Queretaro,
MX
|
|
| 117.131.65.149 |
2.69ms from Shanghai,
CN
|
|
| 202.215.32.213 |
2.45ms from Tokyo,
JP
|
|
| 213.60.184.5 |
0.98ms from A Coruna,
ES
|
|
| 217.100.143.197 |
0.76ms from Amsterdam,
NL
|
|
| 91.220.123.213 |
1.25ms from Amsterdam,
NL
|
|
| 74.235.83.85 |
0.96ms from Ashburn,
US
|
|
| 192.152.153.165 |
10.33ms from Atlanta,
US
|
|
| 20.21.100.101 |
0.20ms from Az Za`ayin,
QA
|
|
| 197.45.178.37 |
5.45ms from Cairo,
EG
|
|
| 102.100.143.37 |
19.40ms from Casablanca,
MA
|
|
| 75.118.124.85 |
10.37ms from Chicago,
US
|
|
| 80.166.234.117 |
3.71ms from Copenhagen,
DK
|
|
| 202.51.180.229 |
0.71ms from Dhaka,
BD
|
|
| 79.236.194.53 |
4.89ms from Duesseldorf,
DE
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Tianjin, 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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