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:         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 is invalid
mnt-by:         MAINT-CSTNET-CN
last-modified:  2026-02-11T13:10:17Z
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 is invalid
abuse-mailbox:  abuse-ip@cstnet.cn
mnt-by:         APNIC-ABUSE
last-modified:  2026-02-11T13:11:38Z
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 210.73.2.0/23

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
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

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

IP Address	ASN	Details
210.73.3.109	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`1.54ms` from Beijing, CN
210.73.2.108	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`1.52ms` 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
107.207.85.199	AS7018 AT&T Enterprises, LLC	`11.23ms` from Dallas, US
211.181.60.71	AS3786 LG DACOM Corporation	`2.05ms` from Incheon, KR
47.179.77.215	AS5650 Frontier Communications of America, Inc.	`0.43ms` from Los Angeles, US
45.78.52.183	AS25820 IT7 Networks Inc	`0.22ms` from Osaka, JP
153.221.244.55	AS4713 NTT DOCOMO BUSINESS,Inc.	`8.46ms` from Osaka, JP
35.180.3.215	AS16509 Amazon.com, Inc.	`0.14ms` from Paris, FR
145.128.176.39	AS28685 Routit BV	`2.46ms` from Amsterdam, NL
34.239.162.103	AS14618 Amazon.com, Inc.	`0.77ms` from Ashburn, US
110.246.95.87	AS4837 CHINA UNICOM China169 Backbone	`10.41ms` from Beijing, CN
35.86.122.135	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
52.24.241.231	AS16509 Amazon.com, Inc.	`0.19ms` from Boardman, US
182.242.183.151	AS4134 CHINANET-BACKBONE	`1.10ms` from Kunming, CN
74.40.252.87	AS5650 Frontier Communications of America, Inc.	`13.59ms` from Los Angeles, US
189.224.102.23	AS8151 UNINET	`1.95ms` from Monterrey, MX
76.122.24.71	AS7922 Comcast Cable Communications, LLC	`4.62ms` from Orlando, US
201.13.186.23	AS27699 TELEFÔNICA BRASIL S.A	`7.55ms` from Osasco, BR
177.97.178.231	AS18881 TELEFÔNICA BRASIL S.A	`4.96ms` from Sao Paulo, BR
169.48.18.183	AS36351 IBM Cloud	`1.04ms` from Toronto, CA
77.191.27.103	AS6805 Telefonica Germany GmbH & Co.OHG	`5.21ms` from Berlin, DE
125.124.123.71	AS58461 CT-HangZhou-IDC	`5.78ms` from Hangzhou, CN
14.240.196.183	AS45899 VNPT Corp	`4.25ms` from Ho Chi Minh City, VN
156.235.247.135	AS134548 DXTL Tseung Kwan O Service	`0.74ms` from Hong Kong, HK
103.242.105.183	AS58821 PT Lintas Jaringan Nusantara	`0.38ms` from Jakarta, ID
20.164.69.135	AS8075 Microsoft Corporation	`0.16ms` from Johannesburg, ZA
95.154.85.199	AS44724 Octopusnet LTD	`0.79ms` from Vladivostok, RU

Traceroute

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

traceroute -a -n -q1 -f6 210.73.2.12

traceroute to 210.73.2.12 (210.73.2.12): 64 hops max, 52 byte packets

6 [AS7497] 103.2.211.130 4.477 ms

7 [AS7497] 159.226.254.54 3.447 ms

8 *

9 [AS7497] 210.73.2.12 3.72 ms

Measurement taken from

IPinfo ProbeNet in Beijing, CN

On March 13th 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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