210.72.21.0/24

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 210.72.21.0/24

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
210.72.238.0/24	AS9814	bei jing zhao shuang co.,ltd	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
210.72.21.20	chinagate.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

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

IP Address	ASN	Details
210.72.21.186	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`2.70ms` 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
167.8.39.8	AS19732 TEGNA Inc.	`13.93ms` from Atlanta, US
203.107.86.136	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.71ms` from Beijing, CN
35.90.111.136	AS16509 Amazon.com, Inc.	`0.36ms` from Boardman, US
44.238.133.232	AS16509 Amazon.com, Inc.	`0.14ms` from Boardman, US
113.179.207.8	AS45899 VNPT Corp	`2.91ms` from Hanoi, VN
41.181.5.200	AS16637 MTN SA	`1.60ms` from Johannesburg, ZA
76.89.71.56	AS20001 Charter Communications Inc	`6.02ms` from Los Angeles, US
168.158.126.120	AS20012 Interworks Networking Services	`10.18ms` from Los Angeles, US
198.103.196.200	AS2675 Shared Services Canada	`4.75ms` from Montreal, CA
113.17.38.104	AS4134 CHINANET-BACKBONE	`3.51ms` from Nanning, CN
116.165.73.168	AS4837 CHINA UNICOM China169 Backbone	`8.34ms` from Nanning, CN
100.17.131.104	AS701 Verizon Business	`3.07ms` from New York City, US
91.41.178.152	AS3320 Deutsche Telekom AG	`3.33ms` from Nuernberg, DE
27.215.133.232	AS4837 CHINA UNICOM China169 Backbone	`7.23ms` from Qingdao, CN
98.89.232.88	AS14618 Amazon.com, Inc.	`0.19ms` from Reston, US
178.64.41.104	AS12389 PJSC Rostelecom	`18.50ms` from Saint Petersburg, RU
180.226.192.184	AS17858 LG POWERCOMM	`1.60ms` from Seoul, KR
14.54.36.168	AS4766 Korea Telecom	`2.89ms` from Seoul, KR
120.137.253.232	AS10010 TOKAI Communications Corporation	`14.18ms` from Tokyo, JP
72.133.52.200	AS10796 Charter Communications Inc	`7.34ms` from Chicago, US
27.156.159.200	AS4134 CHINANET-BACKBONE	`3.41ms` from Fuzhou, CN
125.75.242.200	AS4134 CHINANET-BACKBONE	`2.87ms` from Lanzhou, CN
173.77.96.136	AS701 Verizon Business	`2.46ms` from New York City, US
126.81.84.216	AS17676 SoftBank Corp.	`11.36ms` from Osaka, JP
60.156.206.40	AS17676 SoftBank Corp.	`3.65ms` from Osaka, JP

Traceroute

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

traceroute -a -n -q1 -f6 210.72.21.188

traceroute to 210.72.21.188 (210.72.21.188): 64 hops max, 52 byte packets

6 [AS7497] 103.2.211.130 4.802 ms

7 *

8 [AS7497] 210.72.21.188 3.826 ms

Measurement taken from

IPinfo ProbeNet in Beijing, CN

On January 19th 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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