210.73.2.0/23

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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CNIC1-AP
tech-c:         CNIC1-AP
auth:           # Filtered
remarks:        [email protected] 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:         [email protected]
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:         [email protected]
admin-c:        CNIC1-AP
tech-c:         CNIC1-AP
nic-hdl:        AC2741-AP
remarks:        Generated from irt object IRT-CSTNET-CN
remarks:        [email protected] was validated on 2025-07-25
abuse-mailbox:  [email protected]
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:         [email protected]
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 [email protected] if you have any
remarks:        questions regarding this object.
remarks:        Antispam mail please send to [email protected].
notify:         [email protected]
mnt-by:         MAINT-CSTNET-CN
last-modified:  2023-10-06T05:09:23Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 210.73.2.0/23

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

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

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

IP Address	ASN	Details
210.73.2.130	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`1.76ms` from Beijing, CN
210.73.3.115	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`1.90ms` 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
183.172.223.215	AS4538 China Education and Research Network Center	`6.45ms` from Beijing, CN
223.71.147.167	AS56048 China Mobile Communicaitons Corporation	`2.53ms` from Beijing, CN
169.59.210.135	AS36351 IBM Cloud	`1.11ms` from Dallas, US
74.140.42.247	AS10796 Charter Communications Inc	`17.03ms` from Flint, US
98.209.179.7	AS7922 Comcast Cable Communications, LLC	`12.77ms` from Flint, US
47.199.114.23	AS5650 Frontier Communications of America, Inc.	`6.43ms` from Miami, US
72.68.132.231	AS701 Verizon Business	`2.40ms` from New York City, US
37.21.221.199	AS12389 PJSC Rostelecom	`5.48ms` from Novosibirsk, RU
153.221.244.55	AS4713 NTT DOCOMO BUSINESS,Inc.	`9.80ms` from Osaka, JP
82.124.202.135	AS3215 Orange S.A.	`1.39ms` from Paris, FR
169.48.18.183	AS36351 IBM Cloud	`1.02ms` from Toronto, CA
212.123.231.167	AS8220 COLT Technology Services Group Limited	`0.79ms` from Amsterdam, NL
104.6.220.23	AS7018 AT&T Enterprises, LLC	`1.62ms` from Atlanta, US
16.64.118.55	AS8987 Amazon Data Services Ireland Ltd	`0.85ms` from Columbus, US
14.226.147.231	AS45899 VNPT Corp	`7.95ms` from Da Nang, VN
59.89.162.103	AS9829 National Internet Backbone	`6.36ms` from Delhi, IN
5.30.69.199	AS15802 Emirates Integrated Telecommunications Company PJSC	`3.15ms` from Dubai, AE
84.161.88.55	AS3320 Deutsche Telekom AG	`3.55ms` from Duesseldorf, DE
93.131.53.151	AS6805 Telefonica Germany GmbH & Co.OHG	`3.84ms` from Duesseldorf, DE
222.219.217.135	AS4134 CHINANET-BACKBONE	`6.60ms` from Kunming, CN
90.52.49.167	AS3215 Orange S.A.	`7.26ms` from Marseille, FR
168.243.205.7	AS263783 Telefonica Moviles El Salvador S.A. de C.V.	`14.95ms` from San Salvador, SV
39.108.237.39	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.61ms` from Shenzhen, CN
83.188.1.71	AS1257 Tele2 Sverige AB	`8.33ms` from Stockholm, SE
195.240.94.199	AS1136 KPN B.V.	`1.66ms` from Amsterdam, NL

Traceroute

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

traceroute -a -n -q1 -f6 210.73.2.63

traceroute to 210.73.2.63 (210.73.2.63): 64 hops max, 52 byte packets

6 [AS7497] 103.2.211.128 4.491 ms

7 [AS7497] 159.226.254.85 8.022 ms

8 [AS7497] 159.226.254.94 4.365 ms

9 [AS7497] 159.226.254.54 3.539 ms

10 *

11 [AS7497] 210.73.2.63 3.583 ms

Measurement taken from

IPinfo ProbeNet in Beijing, CN

On December 14th 2025

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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