202.121.246.0/23

AS4538 · China Education and Research Network Center

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Summary

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

Nearby Ranges

BGP prefixes that overlap with 202.121.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

Read more

Pingable IPs

2 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
202.121.246.66	AS4538 China Education and Research Network Center	`3.19ms` 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
35.240.36.71	AS396982 Google LLC	`0.14ms` from Brussels, BE
122.136.106.103	AS4837 CHINA UNICOM China169 Backbone	`7.18ms` from Changchun, CN
90.11.117.199	AS3215 Orange S.A.	`12.13ms` from Paris, FR
98.225.225.119	AS7922 Comcast Cable Communications, LLC	`6.42ms` from Piscataway, US
42.60.20.135	AS9506 Singtel Fibre Broadband	`1.48ms` from Singapore, SG
92.60.17.103	AS35047 Abissnet sh.a.	`13.56ms` from Sofia, BG
58.11.43.55	AS17552 True Online	`2.85ms` from Bangkok, TH
186.179.106.231	AS262186 TV AZTECA SUCURSAL COLOMBIA	`3.40ms` from Bogotá, CO
71.169.166.71	AS13977 Fidium	`6.63ms` from Boston, US
61.2.36.23	AS9829 National Internet Backbone	`11.00ms` from Chennai, IN
118.69.183.167	AS18403 FPT Telecom Company	`0.95ms` from Ho Chi Minh City, VN
119.8.107.103	AS136907 HUAWEI CLOUDS	`0.98ms` from Hong Kong, HK
199.87.206.135	AS47022 Wilson Telephone Company Inc	`8.45ms` from Kansas City, US
171.78.174.199	AS24560 Bharti Airtel Ltd., Telemedia Services	`2.39ms` from Lohogaon, IN
92.43.228.199	AS44431 OmniAccess S.L.	`0.20ms` from Madrid, ES
93.90.82.167	AS45055 Dontechsvyaz LLC	`18.44ms` from Moscow, RU
191.23.58.55	AS26599 TELEFÔNICA BRASIL S.A	`2.19ms` from Novo Hamburgo, BR
195.69.239.199	AS196797 Joint Stock Company TransTeleCom	`8.75ms` from Samara, RU
175.127.96.39	AS9318 SK Broadband Co Ltd	`2.11ms` from Seoul, KR
203.45.142.167	AS1221 Telstra Limited	`2.24ms` from Sydney, AU
212.88.13.199	AS8447 A1 Telekom Austria AG	`8.40ms` from Vienna, AT
161.53.216.7	AS2108 Croatian Academic and Research Network	`0.96ms` from Zagreb, HR
130.216.182.39	AS9431 The University of Auckland	`1.31ms` from Auckland, NZ
4.225.101.167	AS8075 Microsoft Corporation	`0.20ms` from Gaevle, SE
122.227.130.183	AS4134 CHINANET-BACKBONE	`6.76ms` from Hangzhou, CN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f2 -m12 202.121.246.122

traceroute to 202.121.246.122 (202.121.246.122): 12 hops max, 52 byte packets

2 [AS749] 11.73.7.213 0.201 ms

3 *

4 *

5 [AS9318] 211.176.57.125 1.878 ms

6 *

7 *

8 [] 123.255.91.118 41.086 ms

9 [AS4538] 101.4.114.181 181.121 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On March 20th 2026

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