202.203.160.0/20

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 202.203.160.0/20

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

BGP prefixes that are contained by 202.203.160.0/20

Range	ASN	Company	Num of IPs
202.203.160.0/24	AS4538	China Education and Research Network	256

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
202.203.240.0/20	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
202.203.187.0/24	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 2 domain names hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
202.203.168.50	kustrerc.com	2

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

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

IP Address	ASN	Details
202.203.173.23	AS4538 China Education and Research Network Center	53.10ms from Zhongwei, CN
202.203.170.2	AS4538 China Education and Research Network Center	52.53ms from Chengdu, CN
202.203.163.230	AS4538 China Education and Research Network Center	51.33ms from Zhongwei, CN
202.203.162.74	AS4538 China Education and Research Network Center	51.26ms from Zhongwei, 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
79.139.11.36	AS23764 CTGNet	6.93ms from Aubervilliers, FR
23.67.21.164	AS16625 Akamai Technologies, Inc.	0.70ms from Bogota, CO
47.229.21.148	AS20115 Charter Communications LLC	4.54ms from Los Angeles, US
38.174.253.180	AS398823 PEG TECH INC	0.33ms from Los Angeles, US
54.163.157.196	AS14618 Amazon.com, Inc.	0.21ms from Reston, US
115.168.88.4	AS4134 CHINANET-BACKBONE	8.14ms from Taiyuan, CN
93.51.152.84	AS12874 Fastweb SpA	1.20ms from Milan, IT
68.204.165.148	AS33363 Charter Communications, Inc	8.54ms from Orlando, US
88.164.154.84	AS12322 Free SAS	11.68ms from Paris, FR
73.171.152.84	AS7922 Comcast Cable Communications, LLC	9.30ms from Tampa, US
198.72.254.36	AS20001 Charter Communications Inc	10.20ms from Los Angeles, US
188.242.23.212	AS35807 SkyNet Ltd.	0.69ms from Saint Petersburg, RU
175.240.160.20	AS4766 Korea Telecom	1.61ms from Seoul, KR
91.14.71.84	AS3320 Deutsche Telekom AG	4.22ms from Frankfurt am Main, DE
36.79.176.244	AS7713 PT Telekomunikasi Indonesia	4.97ms from Jakarta, ID
213.121.21.180	AS2856 British Telecommunications PLC	5.60ms from London, GB
20.27.72.196	AS8075 Microsoft Corporation	0.17ms from Osaka, JP
200.102.213.20	AS8167 V tal	14.95ms from Sao Paulo, BR
13.94.71.52	AS8075 Microsoft Corporation	0.22ms from Dublin, IE
79.35.189.212	AS3269 Telecom Italia S.p.A.	10.08ms from Milan, IT
71.58.191.100	AS7922 Comcast Cable Communications, LLC	19.32ms from Reston, US
81.206.29.84	AS1136 KPN B.V.	1.28ms from Amsterdam, NL
144.6.0.100	AS4764 Aussie Broadband	0.08ms from Brisbane, AU
34.247.37.212	AS16509 Amazon.com, Inc.	0.16ms from Dublin, IE
87.161.52.20	AS3320 Deutsche Telekom AG	4.46ms from Duesseldorf, DE

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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