202.121.81.0/24
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 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
Hosted domains
There are no domains currently hosted on this ASN.
Hosted domains API
Pingable IPs
14 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 202.121.81.251 |
2.17ms 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 |
|---|---|---|
| 184.15.29.40 |
10.67ms from Ashburn,
US
|
|
| 45.30.185.88 |
2.92ms from Atlanta,
US
|
|
| 116.63.9.120 |
4.08ms from Beijing,
CN
|
|
| 80.201.149.88 |
1.92ms from Brussels,
BE
|
|
| 23.95.102.248 |
0.11ms from Buffalo,
US
|
|
| 76.208.227.232 |
3.11ms from Chicago,
US
|
|
| 117.208.9.184 |
16.79ms from Delhi,
IN
|
|
| 94.185.217.232 |
0.09ms from Dubai,
AE
|
|
| 108.131.248.216 |
0.44ms from Dublin,
IE
|
|
| 195.245.18.200 |
6.69ms from Frankfurt am Main,
DE
|
|
| 182.185.120.56 |
3.78ms from Islamabad,
PK
|
|
| 68.70.78.72 |
5.47ms from Kansas City,
US
|
|
| 109.180.98.136 |
3.45ms from London,
GB
|
|
| 98.53.69.8 |
5.74ms from Miami,
US
|
|
| 3.7.30.168 |
0.10ms from Mumbai,
IN
|
|
| 58.243.56.136 |
6.77ms from Nanjing,
CN
|
|
| 189.15.44.120 |
5.90ms from Osasco,
BR
|
|
| 84.208.41.120 |
1.94ms from Sandefjord,
NO
|
|
| 64.113.3.88 |
0.77ms from Seoul,
KR
|
|
| 195.84.101.248 |
0.83ms from Stockholm,
SE
|
|
| 16.170.45.152 |
0.13ms from Stockholm,
SE
|
|
| 87.70.89.152 |
4.10ms from Tel Aviv,
IL
|
|
| 220.102.218.248 |
2.21ms from Tokyo,
JP
|
|
| 81.247.102.248 |
1.76ms from Brussels,
BE
|
|
| 71.68.36.248 |
8.03ms from Charlotte,
US
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Hangzhou, 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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