210.73.56.0/23

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 210.73.56.0/23

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
210.73.128.0/19	AS4134	Wucheng District of Jinhua City huan cheng	8,192
210.73.64.0/19	AS18239	(CPIP)Beijing Information Highway Corp	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	AS4134	Beijing capitalonline data service co.,LTD	4,096
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
210.73.56.5	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`2.79ms` from Beijing, CN
210.73.57.5	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.75ms` 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
13.94.233.7	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
62.217.98.55	AS5408 National Infrastructures for Research and Technology S.A.	`0.94ms` from Athens, GR
104.209.220.39	AS8075 Microsoft Corporation	`0.19ms` from Boydton, US
41.234.49.23	AS8452 TE-AS	`7.06ms` from Cairo, EG
18.225.32.167	AS16509 Amazon.com, Inc.	`1.00ms` from Columbus, US
93.215.166.23	AS3320 Deutsche Telekom AG	`2.34ms` from Duesseldorf, DE
87.175.223.167	AS3320 Deutsche Telekom AG	`6.39ms` from Frankfurt am Main, DE
219.141.50.167	AS4134 CHINANET-BACKBONE	`2.47ms` from Guiyang, CN
113.189.203.167	AS45899 VNPT Corp	`3.22ms` from Hanoi, VN
86.29.205.247	AS5089 Virgin Media Limited	`10.53ms` from London, GB
13.219.68.247	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
211.253.80.183	AS4766 Korea Telecom	`4.92ms` from Seoul, KR
95.17.172.183	AS12479 Orange Espagne SA	`5.92ms` from Zaragoza, ES
51.154.51.231	AS15796 Salt Mobile SA	`2.13ms` from Zuerich, CH
172.72.94.39	AS11426 Charter Communications Inc	`10.77ms` from Atlanta, US
135.237.186.39	AS8075 Microsoft Corporation	`0.74ms` from Boydton, US
86.122.226.23	AS8708 DIGI ROMANIA S.A.	`3.50ms` from Bucharest, RO
118.124.62.23	AS4134 CHINANET-BACKBONE	`2.72ms` from Chengdu, CN
31.48.95.103	AS2856 British Telecommunications PLC	`3.47ms` from London, GB
47.181.166.183	AS5650 Frontier Communications of America, Inc.	`1.39ms` from Los Angeles, US
35.182.53.167	AS16509 Amazon.com, Inc.	`0.13ms` from Montreal, CA
151.248.122.71	AS197695 Domain names registrar REG.RU, Ltd	`0.92ms` from Moscow, RU
45.4.183.135	AS266057 X2 TELECOM LTDA	`3.77ms` from Novo Hamburgo, BR
60.139.83.135	AS17676 SoftBank Corp.	`3.52ms` from Osaka, JP
141.101.67.103	AS13335 Cloudflare, Inc.	`0.20ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f3 210.73.56.1

traceroute to 210.73.56.1 (210.73.56.1): 64 hops max, 52 byte packets

3 [AS749] 11.62.82.178 1.403 ms

4 [AS749] 11.62.83.177 1.36 ms

5 *

6 [AS141679] 106.63.0.165 1.143 ms

7 [AS141679] 106.63.121.21 0.867 ms

8 *

9 *

10 *

11 [AS7497] 159.226.254.73 3.977 ms

12 [AS7497] 159.226.254.162 4.321 ms

13 [AS7497] 210.73.56.1 101.451 ms

Measurement taken from

IPinfo ProbeNet in Tianjin, 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.

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