202.121.252.0/22

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 2 domain names hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
202.121.255.19	lixin.edu.cn	2

Hosted domains API

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Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
202.121.252.66	AS4538 China Education and Research Network Center	`3.08ms` 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
20.71.174.102	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
3.88.129.182	AS14618 Amazon.com, Inc.	`0.89ms` from Ashburn, US
174.64.125.134	AS22773 Cox Communications Inc.	`11.22ms` from Atlanta, US
8.161.11.182	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.60ms` from Beijing, CN
186.128.239.54	AS22927 Telefonica de Argentina	`2.38ms` from Buenos Aires, AR
139.215.190.118	AS4837 CHINA UNICOM China169 Backbone	`0.22ms` from Changchun, CN
98.213.61.70	AS7922 Comcast Cable Communications, LLC	`11.76ms` from Chicago, US
86.141.198.182	AS2856 British Telecommunications PLC	`5.86ms` from Erith, GB
211.228.184.134	AS4766 Korea Telecom	`7.68ms` from Incheon, KR
138.4.54.246	AS766 RedIRIS Autonomous System	`0.79ms` from Madrid, ES
72.29.202.214	AS3257 GTT Communications Inc.	`0.23ms` from Miami, US
82.60.109.246	AS3269 Telecom Italia S.p.A.	`1.65ms` from Milan, IT
222.84.97.214	AS4134 CHINANET-BACKBONE	`3.35ms` from Nanning, CN
131.163.17.6	AS8075 Microsoft Corporation	`0.53ms` from Oslo, NO
88.183.249.182	AS12322 Free SAS	`4.83ms` from Paris, FR
68.15.149.150	AS22773 Cox Communications Inc.	`0.77ms` from Phoenix, US
114.73.137.198	AS4804 Microplex PTY LTD	`1.98ms` from Sydney, AU
191.248.198.150	AS18881 TELEFÔNICA BRASIL S.A	`4.97ms` from São Paulo, BR
179.100.65.118	AS27699 TELEFÔNICA BRASIL S.A	`2.88ms` from São Paulo, BR
203.112.223.54	AS17494 Telecom Operator & Internet Service Provider as well	`0.52ms` from Dhaka, BD
3.254.94.166	AS16509 Amazon.com, Inc.	`0.41ms` from Dublin, IE
84.150.177.166	AS3320 Deutsche Telekom AG	`7.71ms` from Frankfurt am Main, DE
149.224.182.182	AS15943 wilhelm.tel GmbH	`0.47ms` from Hamburg, DE
115.19.144.134	AS4766 Korea Telecom	`7.06ms` from Incheon, KR
68.183.32.54	AS14061 DigitalOcean, LLC	`0.27ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -f5 -m11 202.121.254.113

traceroute to 202.121.254.113 (202.121.254.113): 11 hops max, 52 byte packets

5 [AS8966] 5.195.70.166 48.613 ms

6 [AS8966] 194.170.186.3 185.827 ms

7 *

8 [AS4538] 101.4.114.181 289.507 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Kuwait City, KW

On March 13th 2026

What are IP address ranges?

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