202.203.80.0/21

AS4538 · China Education and Research Network Center

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Summary

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

Nearby Ranges

BGP prefixes that overlap with 202.203.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

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

Read more

Pingable IPs

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

IP Address	ASN	Details
202.203.84.3	AS4538 China Education and Research Network Center	`31.57ms` from Chengdu, 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
160.178.163.245	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`7.21ms` from Casablanca, MA
151.206.85.149	AS8075 Microsoft Corporation	`0.28ms` from Des Moines, US
212.224.86.69	AS214036 Ultahost, Inc.	`0.47ms` from Frankfurt am Main, DE
128.78.181.149	AS5410 Bouygues Telecom SA	`4.54ms` from Frankfurt am Main, DE
38.128.74.181	AS33313 Crown Castle Fiber LLC	`0.79ms` from Los Angeles, US
87.220.219.165	AS12479 Orange Espagne SA	`12.11ms` from Madrid, ES
79.116.76.245	AS57269 DIGI SPAIN TELECOM S.L.	`0.86ms` from Madrid, ES
79.99.93.5	AS9144 Europabet LLC	`0.51ms` from Milan, IT
71.172.28.245	AS701 Verizon Business	`1.90ms` from Secaucus, US
13.61.79.213	AS16509 Amazon.com, Inc.	`0.13ms` from Stockholm, SE
114.69.106.197	AS2519 ARTERIA Networks Corporation	`9.05ms` from Tokyo, JP
75.3.94.69	AS7018 AT&T Enterprises, LLC	`3.17ms` from Atlanta, US
12.34.105.245	AS7018 AT&T Enterprises, LLC	`0.85ms` from Atlanta, US
34.55.164.133	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
50.221.147.53	AS7922 Comcast Cable Communications, LLC	`1.27ms` from Denver, US
103.155.236.197	AS141333 Rocket Media Group	`0.13ms` from Indore, IN
60.164.43.69	AS4134 CHINANET-BACKBONE	`4.29ms` from Lanzhou, CN
176.196.65.229	AS39927 E-Light-Telecom Ltd.	`4.58ms` from Novosibirsk, RU
220.213.98.165	AS17961 mitene internet co., ltd.	`5.50ms` from Osaka, JP
179.109.222.21	AS263590 LOCAWEB SERVICOS DE INTERNET S.A.	`0.61ms` from Osasco, BR
78.193.158.197	AS12322 Free SAS	`1.96ms` from Paris, FR
180.65.129.197	AS9318 SK Broadband Co Ltd	`2.02ms` from Seoul, KR
18.181.39.53	AS16509 Amazon.com, Inc.	`0.24ms` from Tokyo, JP
110.67.67.117	AS2527 Sony Network Communications Inc.	`1.83ms` from Tokyo, JP
113.57.3.213	AS4837 CHINA UNICOM China169 Backbone	`1.29ms` from Wuhan, CN

Traceroute

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

traceroute -a -n -q1 -f3 -m13 202.203.82.220

traceroute to 202.203.82.220 (202.203.82.220): 13 hops max, 52 byte packets

3 [AS749] 11.95.20.9 0.398 ms

4 *

5 *

6 *

7 *

8 [AS4637] 210.57.81.65 23.54 ms

9 [] 123.255.91.118 51.299 ms

10 [AS4538] 101.4.114.181 79.979 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Manila, PH

On November 22nd 2025

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