210.72.20.0/24

AS7497 · Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)

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Summary

Country	China
Domain	cnic.cn
ASN	AS7497
Parent Range	210.72.0.0/17
Registry	APNIC
ID	CSTNET-CN

WHOIS Details

inetnum:        210.72.0.0 - 210.72.127.255
netname:        CSTNET-CN
descr:          Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
country:        CN
org:            ORG-CA107-AP
admin-c:        CNIC1-AP
tech-c:         CNIC1-AP
abuse-c:        AC2741-AP
status:         ALLOCATED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CSTNET-CN
mnt-routes:     MAINT-CSTNET-CN
mnt-irt:        IRT-CSTNET-CN
last-modified:  2023-10-09T05:58:10Z
source:         APNIC

irt:            IRT-CSTNET-CN
address:        2 Dongsheng South Road, Haidian District, Beijing Beijing 100190
e-mail:         abuse-ip@cstnet.cn
abuse-mailbox:  abuse-ip@cstnet.cn
admin-c:        CNIC1-AP
tech-c:         CNIC1-AP
auth:           # Filtered
remarks:        abuse-ip@cstnet.cn was validated on 2025-07-25
mnt-by:         MAINT-CSTNET-CN
last-modified:  2025-11-18T00:35:26Z
source:         APNIC

organisation:   ORG-CA107-AP
org-name:       CNIC-CAS
org-type:       LIR
country:        CN
address:        2 Dongsheng South Road, Haidian District
phone:          +86.10.58812266
e-mail:         support@cnic.cn
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:18:50Z
source:         APNIC

role:           ABUSE CSTNETCN
country:        ZZ
address:        2 Dongsheng South Road, Haidian District, Beijing Beijing 100190
phone:          +000000000
e-mail:         abuse-ip@cstnet.cn
admin-c:        CNIC1-AP
tech-c:         CNIC1-AP
nic-hdl:        AC2741-AP
remarks:        Generated from irt object IRT-CSTNET-CN
remarks:        abuse-ip@cstnet.cn was validated on 2025-07-25
abuse-mailbox:  abuse-ip@cstnet.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-07-25T01:16:46Z
source:         APNIC

role:           Computer Network Information Center of Chinese Academy of Sciences administrator
address:        2 Dongsheng South Road, Haidian District, Beijing Beijing 100190
country:        CN
phone:          +86.10.58812266
e-mail:         supervise@cnic.cn
admin-c:        CNIC1-AP
tech-c:         CNIC1-AP
nic-hdl:        CNIC1-AP
mnt-by:         MAINT-CNICOCAOS-CN
last-modified:  2022-05-12T07:31:01Z
source:         APNIC

route:          210.72.0.0/17
descr:          Route origin from CSTNET
country:        CN
origin:         AS7497
remarks:        Please contact lihong@cstnet.cn if you have any
remarks:        questions regarding this object.
remarks:        Antispam mail please send to antispam@cstnet.cn.
notify:         lihong@cstnet.cn
mnt-by:         MAINT-CSTNET-CN
last-modified:  2023-10-06T05:09:22Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 210.72.20.0/24

Range	ASN	Company	Num of IPs
210.72.0.0/17	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	32,768

Nearby Ranges

BGP prefixes that overlap with 210.72.0.0/16

Range	ASN	Company	Num of IPs
210.72.0.0/17	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	32,768
210.72.160.0/19	AS4808	China Internet Network Information Center	8,192
210.72.192.0/19	AS4808	Communication Center, China Aerospace	8,192
210.72.128.0/19	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	8,192

Hosted domains

There are 16 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
210.72.20.216	peopleschina.com	12
210.72.20.98	xn--fiq95g7tfbto55sm7drvi.xn--55qx5d	1
210.72.20.120	chinafotobank.com	1
210.72.20.200	blossompress.cn	1
210.72.20.89	accws.org.cn	1

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

Read more

Pingable IPs

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

IP Address	ASN	Details
210.72.20.5	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`1.42ms` from Beijing, 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
37.97.137.40	AS20857 Signet B.V.	`0.57ms` from Amsterdam, NL
72.157.40.152	AS6389 AT&T Enterprises, LLC	`3.61ms` from Atlanta, US
60.207.39.200	AS4808 China Unicom Beijing Province Network	`3.23ms` from Beijing, CN
211.99.189.72	AS9308 Abitcool(China) Inc.	`2.72ms` from Beijing, CN
52.251.16.232	AS8075 Microsoft Corporation	`0.23ms` from Boydton, US
35.210.249.232	AS15169 Google LLC	`0.17ms` from Brussels, BE
23.17.230.136	AS852 TELUS Communications Inc.	`9.40ms` from Edmonton, CA
181.233.51.56	AS272094 OPTILINK CIA LTDA	`7.80ms` from Guayaquil, EC
114.234.43.40	AS4134 CHINANET-BACKBONE	`10.27ms` from Huai'an, CN
95.134.202.40	AS395793 Arisk Communications inc.	`1.77ms` from Jakarta, ID
195.77.22.72	AS3352 TELEFONICA DE ESPANA S.A.U.	`6.23ms` from Madrid, ES
1.120.224.216	AS1221 Telstra Limited	`14.53ms` from Melbourne, AU
3.226.63.184	AS14618 Amazon.com, Inc.	`0.16ms` from Reston, US
64.180.42.40	AS852 TELUS Communications Inc.	`3.96ms` from Seattle, US
59.122.70.40	AS3462 Data Communication Business Group	`2.61ms` from Taipei, TW
107.13.97.184	AS11426 Charter Communications Inc	`10.34ms` from Washington, US
158.115.165.88	AS20257 Farmers Telephone Cooperative, Inc.	`9.73ms` from Atlanta, US
47.26.23.120	AS20115 Charter Communications LLC	`9.33ms` from Chicago, US
3.132.65.56	AS16509 Amazon.com, Inc.	`0.18ms` from Columbus, US
171.33.244.8	AS33991 Igra-Service LLC	`0.64ms` from Krasnoyarsk, RU
143.54.227.152	AS19200 Universidade Federal do Rio Grande do Sul	`0.92ms` from Porto Alegre, BR
107.22.254.168	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
177.180.99.40	AS28573 Claro NXT Telecomunicacoes Ltda	`8.10ms` from Sao Paulo, BR
222.105.140.24	AS4766 Korea Telecom	`4.26ms` from Seoul, KR
54.255.225.152	AS16509 Amazon.com, Inc.	`0.12ms` from Singapore, SG

Traceroute

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

traceroute -a -n -q1 -f6 210.72.20.1

traceroute to 210.72.20.1 (210.72.20.1): 64 hops max, 52 byte packets

6 [AS7497] 103.2.211.130 4.418 ms

7 [AS7497] 159.226.46.146 37.121 ms

8 [AS7497] 210.72.20.1 2.817 ms

Measurement taken from

IPinfo ProbeNet in Beijing, CN

On January 9th 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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