202.127.216.0/21

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Registry	APNIC
ID	BJR-CERNET

WHOIS Details

inetnum:        202.127.216.0 - 202.127.223.255
netname:        BJR-CERNET
descr:          China Education and Research Network
descr:          Beijing Regional Network
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        origin AS4538
remarks:        old NJTU-CN returned on 19951109
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:18Z
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 202.127.0.0/16

Range	ASN	Company	Num of IPs
202.127.80.0/20	AS24255	Tannan Cable Television Corporation	4,096
202.127.176.0/20	AS24259	kanuma cable television Corporation	4,096
202.127.240.0/20	AS4538	China Education and Research Network	4,096
202.127.144.0/20	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	4,096
202.127.16.0/20	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	4,096
202.127.96.0/20	AS17910	PT. Tigatra Infokom	4,096
202.127.32.0/21	AS46030	PT Wahan Inovasi Nusantara	2,048
202.127.0.0/21	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	2,048
202.127.200.0/21	AS7497	The Hefei Branch of Chinese Academy of Sciences	2,048
202.127.40.0/21	AS4808	Information Center, Ministry of Agriculture and Rural Affairs, PRC	2,048
202.127.168.0/21	AS24396	Bank Of China(Hong Kong) Limited	2,048
202.127.12.0/22	AS9929	Nanjing Institute of Science and Technology Information	1,024
202.127.32.0/22	AS46030	PT Wahan Inovasi Nusantara	1,024
202.127.69.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.11.0/24	AS140220	Sky Broadband	256
202.127.8.0/24	AS140220	Sky Broadband	256
202.127.9.0/24	AS140220	Sky Broadband	256
202.127.106.0/24	AS17910	Infrastructure for Serial Customer	256
202.127.10.0/24	AS140220	Sky Broadband	256
202.127.73.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.74.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.76.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.77.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.78.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.79.0/24	AS4637	Telstra Global Internet Services Network Blocks	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
202.127.217.85	AS4538 China Education and Research Network Center	`2.05ms` from Shenzhen, CN
202.127.216.241	AS4538 China Education and Research Network Center	`1.62ms` from Wuhan, 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
24.181.42.69	AS20115 Charter Communications LLC	`15.67ms` from Atlanta, US
93.226.249.53	AS3320 Deutsche Telekom AG	`5.68ms` from Berlin, DE
44.240.155.197	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
181.57.212.101	AS14080 Telmex Colombia S.A.	`0.88ms` from Bogota, CO
75.86.73.37	AS10796 Charter Communications Inc	`4.62ms` from Chicago, US
128.117.213.133	AS194 University Corporation for Atmospheric Research	`4.41ms` from Denver, US
87.164.235.165	AS3320 Deutsche Telekom AG	`3.52ms` from Duesseldorf, DE
157.230.77.117	AS14061 DigitalOcean, LLC	`0.20ms` from Frankfurt am Main, DE
223.122.161.245	AS137872 China Mobile Hong Kong Company Limited	`2.40ms` from Hong Kong, HK
222.127.82.5	AS132199 Globe Telecom Inc.	`4.81ms` from Manila, PH
187.208.254.117	AS8151 UNINET	`1.78ms` from Mexico City, MX
140.160.0.21	AS15199 Western Washington University	`2.43ms` from Seattle, US
183.100.85.133	AS4766 Korea Telecom	`2.02ms` from Seoul, KR
180.167.88.101	AS4812 China Telecom (Group)	`3.73ms` from Shanghai, CN
89.215.13.229	AS13124 A1 Bulgaria EAD	`6.14ms` from Sofia, BG
202.39.205.5	AS3462 Data Communication Business Group	`1.01ms` from Taipei, TW
180.11.102.133	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.60ms` from Tokyo, JP
172.211.65.133	AS8075 Microsoft Corporation	`1.20ms` from Amsterdam, NL
103.73.229.21	AS132727 Strata Networks Ltd	`0.86ms` from Auckland, NZ
52.222.124.53	AS8987 Amazon Data Services Ireland Ltd	`0.33ms` from Boardman, US
158.179.175.149	AS31898 Oracle Corporation	`0.15ms` from Chuncheon, KR
83.219.96.133	AS137409 GSL Networks Pty LTD	`0.14ms` from Dallas, US
79.192.207.53	AS3320 Deutsche Telekom AG	`4.46ms` from Duesseldorf, DE
39.113.191.133	AS9318 SK Broadband Co Ltd	`6.95ms` from Incheon, KR
38.253.239.21	AS141146 PT Indonesia Telekomunikasi Teknologi	`0.55ms` from Jakarta, ID

Traceroute

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

traceroute -a -n -q1 -m7 202.127.223.104

traceroute to 202.127.223.104 (202.127.223.104): 7 hops max, 52 byte packets

1 [AS15169] 72.14.239.92 143.389 ms

2 [] 123.255.90.107 145.009 ms

3 [AS174] 38.150.75.1 149.371 ms

4 [AS4538] 101.4.114.181 178.217 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On February 7th 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.

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