202.121.0.0/16

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

Sign up for free ›

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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        [email protected] 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:         [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        [email protected] was validated on 2025-08-15
abuse-mailbox:  [email protected]
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:         [email protected]
remarks:        [email protected]
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 202.0.0.0/8

Range ASN Company Num of IPs
202.192.0.0/13 AS4538 China Education and Research Network 524,288
202.28.0.0/15 AS147312 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS133042 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS56277 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS24328 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS149800 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS23687 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS17479 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS4621 Office of Info.Tech. Admin. for Educational Development 131,072
202.112.0.0/15 AS4538 China Education and Research Network 131,072
202.28.0.0/15 AS17827 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS9551 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS38589 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS24475 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS55545 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS17823 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS55488 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS9562 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS9546 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS135528 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS9533 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS45847 Office of Info.Tech. Admin. for Educational Development 131,072
202.184.0.0/15 AS9930 TT DOTCOM SDN BHD 131,072
202.28.0.0/15 AS136624 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS4762 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS133919 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS37992 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS38265 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS140618 Office of Info.Tech. Admin. for Educational Development 131,072
202.186.0.0/15 AS9930 TT DOTCOM SDN BHD 131,072
202.28.0.0/15 AS9464 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS140075 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS10227 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS134064 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS135616 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS149503 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS132879 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS9475 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS138003 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS132514 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS131221 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS131257 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS137850 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS134690 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS137198 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS132250 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS132493 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS150107 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS139753 Office of Info.Tech. Admin. for Educational Development 131,072
202.28.0.0/15 AS141714 Office of Info.Tech. Admin. for Educational Development 131,072

Hosted domains

There are 21 domain names hosted across 20 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
202.121.7.82 xn--fhq6a3yv25bi5c6et11ec7jm64aqp6b.cn 1
202.121.31.5 shcc.edu.cn 1
202.121.16.2 shjtxx.net 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

Pingable IPs

5,714 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
202.121.56.118 AS4538 China Education and Research Network Center 76.13ms from UEruemqi, CN
202.121.209.90 AS4538 China Education and Research Network Center 5.95ms from Shanghai, CN
202.121.96.153 AS4538 China Education and Research Network Center 1.94ms from Shanghai, CN
202.121.100.201 AS4538 China Education and Research Network Center 1.88ms from Shanghai, CN
202.121.174.30 AS4538 China Education and Research Network Center 4.76ms from Shanghai, CN
202.121.210.1 AS4538 China Education and Research Network Center 6.64ms from Shanghai, CN
202.121.92.33 AS4538 China Education and Research Network Center 3.15ms from Shanghai, CN
202.121.105.181 AS4538 China Education and Research Network Center 1.94ms from Shanghai, CN
202.121.246.66 AS4538 China Education and Research Network Center 2.47ms from Shanghai, CN
202.121.177.39 AS4538 China Education and Research Network Center 2.35ms from Shanghai, CN
202.121.55.195 AS4538 China Education and Research Network Center 41.80ms from Chengdu, CN
202.121.4.193 AS4538 China Education and Research Network Center 4.93ms from Shanghai, CN
202.121.117.152 AS4538 China Education and Research Network Center 5.86ms from Shanghai, CN
202.121.181.149 AS4538 China Education and Research Network Center 1.74ms from Shanghai, CN
202.121.224.234 AS4538 China Education and Research Network Center 2.50ms from Shanghai, CN
202.121.60.218 AS4538 China Education and Research Network Center 4.66ms from Shanghai, CN
202.121.48.241 AS4538 China Education and Research Network Center 4.65ms from Shanghai, CN
202.121.102.128 AS4538 China Education and Research Network Center 1.91ms from Shanghai, CN
202.121.89.207 AS4538 China Education and Research Network Center 5.33ms from Shanghai, CN
202.121.32.90 AS4538 China Education and Research Network Center 2.54ms from Shanghai, CN
202.121.106.190 AS4538 China Education and Research Network Center 1.84ms from Shanghai, CN
202.121.61.77 AS4538 China Education and Research Network Center 29.74ms from Beijing, CN
202.121.50.155 AS4538 China Education and Research Network Center 25.10ms from Qingdao, CN
202.121.21.250 AS4538 China Education and Research Network Center 3.28ms from Shanghai, CN
202.121.147.146 AS4538 China Education and Research Network Center 1.71ms 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
77.164.93.160 AS1136 KPN B.V. 1.22ms from Amsterdam, NL
45.200.139.0 AS60609 APFUTURA TELECOM SL 1.01ms from Barcelona, ES
142.11.241.240 AS54290 Hostwinds LLC. 0.24ms from Dallas, US
86.62.209.192 AS42298 GCC MPLS peering 0.89ms from Doha, QA
193.138.120.128 AS202803 MVA S.r.l. 11.56ms from Frosinone, IT
167.172.157.48 AS14061 DigitalOcean, LLC 0.25ms from New York City, US
220.239.26.224 AS4804 Microplex PTY LTD 8.49ms from Perth, AU
218.209.107.0 AS23563 SK Broadband Co Ltd 1.83ms from Seoul, KR
115.18.226.160 AS4766 Korea Telecom 7.15ms from Seoul, KR
121.175.217.16 AS4766 Korea Telecom 6.43ms from Seoul, KR
211.210.165.128 AS9318 SK Broadband Co Ltd 1.41ms from Seoul, KR
221.170.45.128 AS2518 BIGLOBE Inc. 15.39ms from Tokyo, JP
99.242.13.80 AS812 Rogers Communications Canada Inc. 6.31ms from Toronto, CA
75.91.48.240 AS7029 Windstream Communications LLC 13.10ms from Atlanta, US
34.57.221.32 AS396982 Google LLC 0.10ms from Council Bluffs, US
78.35.159.192 AS8422 NetCologne Gesellschaft fur Telekommunikation mbH 4.05ms from Duesseldorf, DE
92.51.161.80 AS8972 Host Europe GmbH 3.05ms from Frankfurt am Main, DE
51.38.191.224 AS16276 OVH SAS 0.12ms from Gravelines, FR
70.120.187.192 AS11427 Charter Communications Inc 18.49ms from Houston, US
178.168.207.16 AS25106 Mobile TeleSystems JLLC 4.02ms from Minsk, BY
65.32.44.48 AS33363 Charter Communications, Inc 8.15ms from Orlando, US
72.188.106.48 AS33363 Charter Communications, Inc 6.97ms from Orlando, US
190.160.119.240 AS22047 VTR BANDA ANCHA S.A. 0.79ms from Santiago, CL
189.146.99.80 AS8151 UNINET 3.99ms from Santiago de Queretaro, MX
14.63.30.32 AS4766 Korea Telecom 1.41ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -f4 -m15 202.121.3.164
traceroute to 202.121.3.164 (202.121.3.164): 15 hops max, 52 byte packets
5 *
6 *
7 *
8 *
10 [AS48589] 211.102.30.15 77.009 ms
11 [AS4538] 101.4.117.193 78.779 ms
12 [AS4538] 101.4.118.114 76.441 ms
13 *
14 *
15 *
Measurement taken from IPinfo ProbeNet in Hami, CN
On

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.

IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs