202.120.128.0/20

AS4538 · China Education and Research Network Center

Need more data or want to access it via API or data downloads? Sign up to get free access

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 202.120.0.0/16

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

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

IP Address	ASN	Details
202.120.137.178	AS4538 China Education and Research Network Center	`5.31ms` from Shanghai, CN
202.120.138.157	AS4538 China Education and Research Network Center	`6.63ms` from Shanghai, CN
202.120.134.12	AS4538 China Education and Research Network Center	`5.00ms` from Shanghai, CN
202.120.140.10	AS4538 China Education and Research Network Center	`5.33ms` from Shanghai, CN
202.120.130.240	AS4538 China Education and Research Network Center	`5.93ms` from Shanghai, CN
202.120.135.235	AS4538 China Education and Research Network Center	`4.87ms` from Shanghai, CN
202.120.141.142	AS4538 China Education and Research Network Center	`5.25ms` from Shanghai, CN
202.120.133.142	AS4538 China Education and Research Network Center	`5.60ms` from Shanghai, CN
202.120.143.162	AS4538 China Education and Research Network Center	`4.09ms` from Shanghai, CN
202.120.142.206	AS4538 China Education and Research Network Center	`5.14ms` from Shanghai, CN
202.120.132.20	AS4538 China Education and Research Network Center	`5.11ms` 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
105.203.208.4	AS36992 ETISALAT MISR	`9.20ms` from Cairo, EG
196.92.4.68	AS6713 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`1.89ms` from Casablanca, MA
175.21.178.116	AS4837 CHINA UNICOM China169 Backbone	`4.58ms` from Changchun, CN
208.101.252.164	AS14230 ARK Data Centers LLC	`6.31ms` from Cleveland, US
64.233.129.4	AS23404 Ritter Communications	`11.23ms` from Dallas, US
184.87.99.20	AS16625 Akamai Technologies, Inc.	`0.49ms` from Hong Kong, HK
37.139.188.116	AS25133 LLC "McLaut-Invest"	`3.07ms` from Kyiv, UA
104.152.50.4	AS18450 WebNX, Inc.	`0.62ms` from Los Angeles, US
92.150.197.36	AS3215 Orange S.A.	`2.39ms` from Marseille, FR
39.67.165.164	AS4837 CHINA UNICOM China169 Backbone	`5.97ms` from Qingdao, CN
180.23.111.116	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.29ms` from Tokyo, JP
208.68.224.20	AS19367 Carousel Industries of North America, LLC	`5.96ms` from Boston, US
91.177.188.84	AS5432 Proximus NV	`1.19ms` from Brussels, BE
65.184.66.180	AS11426 Charter Communications Inc	`4.83ms` from Charlotte, US
18.188.172.52	AS16509 Amazon.com, Inc.	`0.19ms` from Columbus, US
106.215.76.148	AS24560 Bharti Airtel Ltd., Telemedia Services	`9.94ms` from Delhi, IN
92.132.234.212	AS3215 Orange S.A.	`8.85ms` from Marseille, FR
180.25.185.100	AS4713 NTT DOCOMO BUSINESS,Inc.	`12.77ms` from Osaka, JP
34.166.236.4	AS396982 Google LLC	`6.50ms` from Riyadh, SA
93.190.202.100	AS47236 CityLink Ltd	`8.36ms` from Samara, RU
39.116.199.196	AS9318 SK Broadband Co Ltd	`5.76ms` from Seoul, KR
139.99.131.116	AS16276 OVH SAS	`0.13ms` from Sydney, AU
169.63.64.84	AS36351 IBM Cloud	`0.43ms` from Ashburn, US
75.43.177.180	AS7018 AT&T Enterprises, LLC	`9.92ms` from Atlanta, US
204.38.48.20	AS237 Merit Network Inc.	`12.15ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 -m15 202.120.143.193

traceroute to 202.120.143.193 (202.120.143.193): 15 hops max, 52 byte packets

1 [AS141995] 154.26.153.11 0.378 ms

2 *

3 *

4 *

5 *

6 *

7 [AS6939] 184.104.199.181 126.835 ms

8 *

9 [AS4538] 101.4.114.181 159.132 ms

10 *

11 *

12 [AS4538] 101.4.115.249 159.835 ms

13 *

14 *

15 *

Measurement taken from

IPinfo ProbeNet in Sydney, AU

On March 20th 2026

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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales