210.73.50.0/23

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	210.73.0.0/18
Registry	APNIC
ID	CSTNET-CN

WHOIS Details

inetnum:        210.73.0.0 - 210.73.63.255
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:          210.73.0.0/18
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:  2023-10-06T05:09:23Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 210.73.50.0/23

Range	ASN	Company	Num of IPs
210.73.0.0/18	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	16,384

Nearby Ranges

BGP prefixes that overlap with 210.73.0.0/16

Range	ASN	Company	Num of IPs
210.73.0.0/18	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	16,384
210.73.64.0/19	AS18239	(CPIP)Beijing Information Highway Corp	8,192
210.73.128.0/19	AS4134	Wucheng District of Jinhua City huan cheng	8,192
210.73.160.0/19	AS45090	Tencent cloud computing (Beijing) Co., Ltd.	8,192
210.73.224.0/19	AS4808	Shanghai Hongmao Information Technology Co. Ltd	8,192
210.73.208.0/20	AS4808	Beijing capitalonline data service co.,LTD	4,096

Hosted domains

There are no domains currently hosted on this ASN.

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

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

IP Address	ASN	Details
210.73.51.252	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.86ms` from Shanghai, 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
156.193.149.23	AS8452 TE-AS	`3.00ms` from Cairo, EG
65.25.214.87	AS10796 Charter Communications Inc	`9.52ms` from Chicago, US
54.230.231.231	AS16509 Amazon.com, Inc.	`0.11ms` from Dallas, US
57.129.65.215	AS16276 OVH SAS	`0.11ms` from Frankfurt am Main, DE
180.95.224.167	AS4837 CHINA UNICOM China169 Backbone	`2.29ms` from Lanzhou, CN
217.196.239.199	AS39326 Syntura Group Limited	`0.56ms` from London, GB
145.82.86.23	AS25019 Saudi Telecom Company JSC	`3.74ms` from Manama, BH
207.108.80.231	AS33277 Cu Cooperative Systems, Inc.	`4.79ms` from Monticello, US
18.229.57.87	AS16509 Amazon.com, Inc.	`0.16ms` from Osasco, BR
107.149.59.231	AS54600 PEG TECH INC	`0.68ms` from San Jose, US
63.203.249.151	AS7018 AT&T Enterprises, LLC	`1.64ms` from San Jose, US
222.119.240.135	AS4766 Korea Telecom	`7.53ms` from Seoul, KR
157.205.252.7	AS17514 Otsuka Corp.	`1.21ms` from Tokyo, JP
181.9.64.7	AS7303 Telecom Argentina S.A.	`16.11ms` from Buenos Aires, AR
90.132.86.103	AS1257 Tele2 Sverige AB	`1.57ms` from Copenhagen, DK
172.205.63.151	AS8075 Microsoft Corporation	`0.22ms` from Dublin, IE
114.216.93.103	AS140292 CHINATELECOM Jiangsu province Suzhou 5G network	`7.71ms` from Huai'an, CN
91.199.93.183	AS44352 I.T.T. Tehnologiya LLC	`0.76ms` from Kyiv, UA
144.34.175.183	AS25820 IT7 Networks Inc	`0.32ms` from Los Angeles, US
5.128.186.7	AS31200 Novotelecom Ltd	`1.17ms` from Novosibirsk, RU
60.109.23.39	AS17676 SoftBank Corp.	`3.69ms` from Osaka, JP
218.42.26.55	AS2518 BIGLOBE Inc.	`7.73ms` from Osaka, JP
84.209.113.215	AS25400 Telia Norge AS	`10.08ms` from Sandefjord, NO
118.37.23.103	AS4766 Korea Telecom	`0.98ms` from Seoul, KR
1.244.173.23	AS9318 SK Broadband Co Ltd	`2.75ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 -f4 210.73.51.251

traceroute to 210.73.51.251 (210.73.51.251): 64 hops max, 52 byte packets

4 [AS4134] 61.160.7.9 2.974 ms

5 *

6 *

7 *

8 [AS4134] 202.97.44.130 7.8 ms

9 [AS7497] 159.226.253.161 9.455 ms

10 *

11 *

12 [AS7497] 210.73.51.251 11.93 ms

Measurement taken from

IPinfo ProbeNet in Huai'an, CN

On February 7th 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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