210.77.0.0/21

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	210.77.0.0/19
Registry	APNIC
ID	CSTNET-CN

WHOIS Details

inetnum:        210.77.0.0 - 210.77.31.255
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:  2023-10-10T01:38:39Z
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:          210.77.0.0/19
descr:          China Science & Technology Network
country:        CN
origin:         AS7497
mnt-by:         MAINT-CSTNET-CN
last-modified:  2023-10-06T05:09:24Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 210.77.0.0/21

Range	ASN	Company	Num of IPs
210.77.0.0/19	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	8,192

Nearby Ranges

BGP prefixes that overlap with 210.77.0.0/16

Range	ASN	Company	Num of IPs
210.77.0.0/19	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	8,192
210.77.128.0/19	AS23724	21ViaNet(China),Inc.	8,192
210.77.192.0/19	AS4808	China Broadcasting Shandong Network Co., Ltd. Jinan Branch	8,192
210.77.224.0/19	AS4808	China Great Wall Network	8,192
210.77.64.0/19	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	8,192
210.77.176.0/20	AS18241	State Power Information Net	4,096
210.77.176.0/20	AS9814	State Power Information Net	4,096
210.77.154.0/24	AS4835	Full Link (China),Inc.	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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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
210.77.0.50	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`5.35ms` from Beijing, CN
210.77.1.78	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.82ms` 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
54.85.83.181	AS14618 Amazon.com, Inc.	`0.57ms` from Ashburn, US
181.24.10.133	AS22927 Telefonica de Argentina	`2.87ms` from Buenos Aires, AR
84.169.116.229	AS3320 Deutsche Telekom AG	`1.91ms` from Duesseldorf, DE
82.17.61.213	AS5089 Virgin Media Limited	`8.62ms` from London, GB
208.97.248.245	AS3257 GTT Communications Inc.	`0.32ms` from New York City, US
39.73.62.229	AS4837 CHINA UNICOM China169 Backbone	`11.06ms` from Qingdao, CN
45.26.50.197	AS7018 AT&T Enterprises, LLC	`2.54ms` from San Jose, US
115.137.91.85	AS17858 LG POWERCOMM	`2.01ms` from Seoul, KR
89.18.116.85	AS41401 RB Communication AB	`2.10ms` from Stockholm, SE
114.46.212.101	AS3462 Data Communication Business Group	`2.45ms` from Taichung, TW
68.230.186.69	AS22773 Cox Communications Inc.	`0.79ms` from Ashburn, US
50.170.38.5	AS7922 Comcast Cable Communications, LLC	`0.84ms` from Boston, US
135.224.146.53	AS8075 Microsoft Corporation	`0.23ms` from Boydton, US
193.121.152.197	AS5432 Proximus NV	`2.21ms` from Brussels, BE
75.177.236.165	AS11426 Charter Communications Inc	`11.08ms` from Charlotte, US
172.114.75.197	AS20001 Charter Communications Inc	`6.54ms` from Los Angeles, US
175.28.210.85	AS7679 QTnet,Inc.	`12.46ms` from Osaka, JP
174.83.181.245	AS20115 Charter Communications LLC	`10.58ms` from San Jose, US
189.20.144.245	AS10429 TELEFÔNICA BRASIL S.A	`0.94ms` from São Paulo, BR
111.255.113.69	AS3462 Data Communication Business Group	`3.87ms` from Taichung, TW
102.24.167.5	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`9.79ms` from Tunis, TN
80.211.141.181	AS31034 Aruba S.p.A.	`0.36ms` from Arezzo, IT
184.30.69.165	AS16625 Akamai Technologies, Inc.	`0.30ms` from Ashburn, US
216.13.160.69	AS6461 Zayo Bandwidth	`0.87ms` from Calgary, CA
95.201.13.69	AS3301 Telia Company AB	`19.68ms` from Copenhagen, DK

Traceroute

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

traceroute -a -n -q1 -f5 -m12 210.77.5.63

traceroute to 210.77.5.63 (210.77.5.63): 12 hops max, 52 byte packets

5 [AS174] 154.54.94.113 149.571 ms

6 [AS174] 154.18.9.165 149.121 ms

7 [AS7497] 159.226.254.229 184.62 ms

8 [AS7497] 159.226.254.237 183.333 ms

9 [AS7497] 159.226.254.162 181.773 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On December 28th 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.

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