202.203.192.0/20

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 202.203.192.0/20

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
202.203.136.0/21	AS4538	China Education and Research Network	2,048
202.203.80.0/21	AS4538	China Education and Research Network	2,048
202.203.128.0/23	AS4538	China Education and Research Network	512
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

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

IP Address	ASN	Details
202.203.204.254	AS4538 China Education and Research Network Center	82.57ms from Lanzhou, CN
202.203.198.1	AS4538 China Education and Research Network Center	51.75ms from Chengdu, CN
202.203.195.83	AS4538 China Education and Research Network Center	50.99ms from Zhongwei, CN
202.203.192.77	AS4538 China Education and Research Network Center	51.05ms from Zhongwei, CN
202.203.200.144	AS4538 China Education and Research Network Center	16.89ms 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
128.8.205.196	AS27 University of Maryland	2.37ms from Ashburn, US
191.59.61.116	AS4230 CLARO S.A.	13.89ms from Brasilia, BR
38.106.193.180	AS174 Cogent Communications	0.41ms from Chicago, US
192.34.105.36	AS18864 First United Bank and Trust Company	3.12ms from Dallas, US
169.1.99.228	AS37611 AFRIHOST SP (PTY) LTD	8.50ms from Johannesburg, ZA
154.210.104.164	AS6079 RCN	0.91ms from Secaucus, US
123.163.2.164	AS4134 CHINANET-BACKBONE	5.82ms from Zhengzhou, CN
181.82.236.148	AS7303 Telecom Argentina S.A.	2.90ms from Buenos Aires, AR
73.18.55.116	AS7922 Comcast Cable Communications, LLC	11.14ms from Flint, US
42.112.68.100	AS18403 FPT Telecom Company	1.50ms from Ho Chi Minh City, VN
92.28.202.20	AS13285 TalkTalk Communications Limited	1.95ms from Manchester, GB
101.230.72.84	AS4812 China Telecom (Group)	3.15ms from Shanghai, CN
150.31.142.244	AS2497 Internet Initiative Japan Inc.	12.52ms from Tokyo, JP
76.127.152.212	AS7922 Comcast Cable Communications, LLC	11.39ms from Boston, US
40.128.52.52	AS7029 Windstream Communications LLC	0.54ms from Dallas, US
90.153.16.68	AS9145 EWE TEL GmbH	5.18ms from Hamburg, DE
40.64.147.36	AS8075 Microsoft Corporation	0.21ms from Kloten, CH
104.12.53.148	AS7018 AT&T Enterprises, LLC	16.71ms from Miami, US
211.46.169.116	AS4766 Korea Telecom	5.45ms from Seoul, KR
39.116.183.164	AS9318 SK Broadband Co Ltd	5.16ms from Seoul, KR
99.155.149.4	AS7018 AT&T Enterprises, LLC	1.94ms from Atlanta, US
13.213.186.20	AS16509 Amazon.com, Inc.	0.14ms from Singapore, SG
37.117.218.100	AS30722 Vodafone Italia S.p.A.	7.26ms from Arezzo, IT
198.90.14.20	AS22334 Ferguson Enterprises, LLC	8.73ms from Chicago, US
181.234.35.132	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	8.46ms from Bogota, CO

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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