202.121.64.0/20

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 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

Nearby Ranges

BGP prefixes that overlap with 202.121.0.0/16

No nearby ranges found.

Hosted domains

There is 1 domain name hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
202.121.64.7	shou.edu.cn	1
202.121.64.9	shou.edu.cn	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
202.121.64.116	AS4538 China Education and Research Network Center	`3.24ms` from Shanghai, CN
202.121.66.112	AS4538 China Education and Research Network Center	`3.80ms` 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
174.131.51.36	AS7029 Windstream Communications LLC	`3.18ms` from Atlanta, US
89.12.20.116	AS6805 Telefonica Germany GmbH & Co.OHG	`2.88ms` from Berlin, DE
172.86.65.4	AS14956 RouterHosting LLC	`0.22ms` from Dallas, US
95.123.146.68	AS3352 TELEFONICA DE ESPANA S.A.U.	`10.10ms` from Madrid, ES
45.6.62.84	AS265505 INTELVID S.A. DE C.V.	`18.97ms` from Monterrey, MX
3.209.215.180	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
178.70.7.132	AS12389 PJSC Rostelecom	`2.04ms` from Saint Petersburg, RU
50.46.32.244	AS20055 Wholesail networks LLC	`1.61ms` from Seattle, US
176.229.180.52	AS12400 Partner Communications Ltd.	`3.31ms` from Tel Aviv, IL
221.103.230.68	AS17676 SoftBank Corp.	`2.83ms` from Tokyo, JP
82.193.248.244	AS207503 neu-medianet GmbH	`7.17ms` from Berlin, DE
52.61.199.20	AS8987 Amazon Data Services Ireland Ltd	`0.34ms` from Boardman, US
107.11.42.132	AS10796 Charter Communications Inc	`6.46ms` from Columbus, US
58.249.144.36	AS17622 China Unicom Guangzhou network	`6.16ms` from Guangzhou, CN
60.231.242.164	AS1221 Telstra Limited	`2.37ms` from Perth, AU
112.236.231.68	AS4837 CHINA UNICOM China169 Backbone	`8.28ms` from Qingdao, CN
176.231.136.244	AS12400 Partner Communications Ltd.	`1.12ms` from Rosh Ha‘Ayin, IL
217.115.44.116	AS29518 Bredband2 AB	`0.35ms` from Stockholm, SE
114.39.177.52	AS3462 Data Communication Business Group	`4.18ms` from Taichung, TW
34.130.112.196	AS396982 Google LLC	`0.10ms` from Toronto, CA
120.92.111.244	AS59019 Beijing Kingsoft Cloud Internet Technology Co., Ltd	`2.80ms` from Beijing, CN
41.136.20.20	AS23889 Mauritius Telecom Ltd	`1.86ms` from Ebene, MU
163.227.3.244	AS135905 VIETNAM POSTS AND TELECOMMUNICATIONS GROUP	`0.66ms` from Hanoi, VN
14.180.64.4	AS45899 VNPT Corp	`6.05ms` from Hanoi, VN
34.35.96.212	AS396982 Google LLC	`0.11ms` from Johannesburg, ZA

Traceroute

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

traceroute -a -n -q1 -f2 -m17 202.121.69.186

traceroute to 202.121.69.186 (202.121.69.186): 17 hops max, 52 byte packets

2 [AS749] 11.73.10.89 1.816 ms

3 *

4 *

5 *

6 [AS4538] 101.4.131.133 3.094 ms

7 [AS4538] 219.224.103.89 3.471 ms

8 *

9 [AS4538] 101.4.112.46 18.292 ms

10 *

11 [AS4538] 101.4.117.42 33.809 ms

12 *

13 *

14 [AS4538] 202.112.27.18 37.273 ms

15 *

16 *

17 *

Measurement taken from

IPinfo ProbeNet in Shenzhen, CN

On January 19th 2026

What are IP address ranges?

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