202.203.128.0/23

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	202.203.0.0/16
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 2025-01-22
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-01-22T13:47:43Z
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 2025-01-22
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-01-22T16:25:45Z
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

Overlapping Ranges

BGP prefixes that contain 202.203.128.0/23

Range	ASN	Company	Num of IPs
202.203.0.0/16	AS4538	China Education and Research Network	65,536
202.203.0.0/16	AS138378	China Education and Research Network	65,536
202.200.0.0/13	AS4538	China Education and Research Network	524,288
202.192.0.0/12	AS4538	China Education and Research Network	1,048,576

Nearby Ranges

BGP prefixes that overlap with 202.203.0.0/16

Range	ASN	Company	Num of IPs
202.192.0.0/12	AS4538	China Education and Research Network	1,048,576
202.200.0.0/13	AS4538	China Education and Research Network	524,288
202.203.0.0/16	AS138378	China Education and Research Network	65,536
202.203.0.0/16	AS4538	China Education and Research Network	65,536
202.203.224.0/20	AS4538	China Education and Research Network	4,096
202.203.176.0/20	AS4538	China Education and Research Network	4,096
202.203.208.0/20	AS4538	China Education and Research Network	4,096
202.203.144.0/20	AS4538	China Education and Research Network	4,096
202.203.64.0/20	AS4538	China Education and Research Network	4,096
202.203.48.0/20	AS4538	China Education and Research Network	4,096
202.203.160.0/20	AS4538	China Education and Research Network	4,096
202.203.240.0/20	AS4538	China Education and Research Network	4,096
202.203.32.0/20	AS4538	China Education and Research Network	4,096
202.203.192.0/20	AS4538	China Education and Research Network	4,096
202.203.136.0/21	AS4538	China Education and Research Network	2,048
202.203.80.0/21	AS4538	China Education and Research Network	2,048
202.203.176.0/24	AS4538	China Education and Research Network	256
202.203.2.0/24	AS4538	China Education and Research Network	256
202.203.66.0/24	AS4538	China Education and Research Network	256
202.203.187.0/24	AS4538	China Education and Research Network	256
202.203.112.0/24	AS4538	China Education and Research Network	256
202.203.160.0/24	AS4538	China Education and Research Network	256
202.203.132.0/24	AS4538	China Education and Research Network	256
202.203.144.0/24	AS4538	China Education and Research Network	256
202.203.16.0/24	AS4538	China Education and Research Network	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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
99.98.184.215	AS7018 AT&T Enterprises, LLC	2.19ms from Durham, US
191.101.65.199	AS61317 Hivelocity LLC	0.37ms from London, GB
34.160.129.103	AS396982 Google LLC	0.07ms from Melbourne, AU
139.162.56.39	AS63949 Akamai Connected Cloud	0.15ms from Singapore, SG
88.9.75.199	AS3352 TELEFONICA DE ESPANA S.A.U.	8.82ms from Madrid, ES
172.184.134.151	AS8075 Microsoft Corporation	0.59ms from San Jose, US
45.27.39.55	AS7018 AT&T Enterprises, LLC	6.53ms from Atlanta, US
99.158.137.87	AS7018 AT&T Enterprises, LLC	17.59ms from Atlanta, US
76.109.165.151	AS7922 Comcast Cable Communications, LLC	13.91ms from Miami, US
142.134.147.103	AS855 Bell Canada	17.80ms from New York City, US
80.124.119.23	AS15557 Societe Francaise Du Radiotelephone - SFR SA	1.74ms from Paris, FR
154.49.201.247	AS174 Cogent Communications	0.78ms from Paris, FR
94.76.137.119	AS29119 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL	3.38ms from Sevilla, ES
171.248.67.215	AS7552 Viettel Group	1.93ms from Ho Chi Minh City, VN
34.21.49.87	AS396982 Google LLC	0.12ms from Ashburn, US
193.191.133.119	AS2611 BELNET	2.32ms from Brussels, BE
85.120.181.215	AS49023 INOVO SOLUTIONS SRL	1.00ms from Bucharest, RO
67.141.78.215	AS7029 Windstream Communications LLC	2.69ms from Dallas, US
209.243.3.71	AS63414 Dakota Central Telecommunications Cooperative	16.00ms from Des Moines, US
83.112.20.151	AS3215 Orange S.A.	10.31ms from Frankfurt am Main, DE
119.178.117.167	AS4837 CHINA UNICOM China169 Backbone	6.53ms from Jinan, CN
93.3.181.199	AS15557 Societe Francaise Du Radiotelephone - SFR SA	7.45ms from Paris, FR
93.100.37.71	AS35807 SkyNet Ltd.	0.62ms from Saint Petersburg, RU
121.142.214.199	AS4766 Korea Telecom	1.45ms from Seoul, KR
211.114.236.135	AS4766 Korea Telecom	1.61ms from Seoul, KR

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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