202.203.187.0/24

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	202.203.176.0/20
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 202.203.187.0/24

Range	ASN	Company	Num of IPs
202.203.176.0/20	AS4538	China Education and Research Network	4,096
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
202.203.128.0/23	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
202.203.112.0/24	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 is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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

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Pingable IPs

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

IP Address	ASN	Details
202.203.187.39	AS4538 China Education and Research Network Center	19.20ms 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
20.163.244.184	AS8075 Microsoft Corporation	0.41ms from Ashburn, US
172.73.15.216	AS11426 Charter Communications Inc	3.78ms from Charlotte, US
74.195.139.248	AS19108 Optimum	15.33ms from Dallas, US
78.2.138.88	AS5391 Hrvatski Telekom d.d.	1.87ms from Zagreb, HR
125.241.207.168	AS17858 LG POWERCOMM	2.14ms from Seoul, KR
65.95.134.72	AS577 Bell Canada	4.15ms from Toronto, CA
52.27.135.72	AS16509 Amazon.com, Inc.	0.17ms from Boardman, US
79.62.62.168	AS3269 Telecom Italia S.p.A.	6.70ms from Milan, IT
41.189.67.24	AS37179 Africa Independent Network Exchange (Pty) LTD (AfricaINX)	0.58ms from Johannesburg, ZA
124.11.131.120	AS9924 Taiwan Fixed Network, Telco and Network Service Provider.	5.96ms from Taipei, TW
176.46.57.72	AS3249 Telia Eesti AS	4.63ms from Tallinn, EE
69.138.185.104	AS7922 Comcast Cable Communications, LLC	5.13ms from Ashburn, US
93.229.41.8	AS3320 Deutsche Telekom AG	5.44ms from Frankfurt am Main, DE
197.202.154.88	AS36947 Telecom Algeria	10.84ms from Algiers, DZ
188.230.193.40	AS34779 T-2, d.o.o.	2.31ms from Ljubljana, SI
84.70.178.104	AS5378 Vodafone Limited	2.98ms from London, GB
188.161.239.248	AS12975 PALTEL Autonomous System	4.72ms from Tel Aviv, IL
125.27.69.200	AS23969 TOT Public Company Limited	2.07ms from Bangkok, TH
72.181.225.168	AS11427 Charter Communications Inc	8.23ms from Dallas, US
92.239.87.88	AS5089 Virgin Media Limited	5.33ms from London, GB
83.44.143.216	AS3352 TELEFONICA DE ESPANA S.A.U.	9.19ms from Madrid, ES
162.250.220.24	AS19696 Vodalink Telecom Inc.	0.52ms from Montreal, CA
3.224.225.24	AS14618 Amazon.com, Inc.	0.21ms from Reston, US
71.58.218.104	AS7922 Comcast Cable Communications, LLC	19.47ms from Reston, US
103.152.135.56	AS141205 Maybank Securities Pte Ltd	1.26ms from Singapore, SG

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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