210.77.8.0/21

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 210.77.8.0/21

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

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Pingable IPs

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

IP Address	ASN	Details
210.77.10.100	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.87ms` from Beijing, CN
210.77.11.205	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.53ms` 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
86.88.140.117	AS1136 KPN B.V.	`0.91ms` from Amsterdam, NL
123.127.207.69	AS4808 China Unicom Beijing Province Network	`3.01ms` from Beijing, CN
41.73.170.197	AS36965 WIA Tanzania	`0.75ms` from Dar es Salaam, TZ
78.100.28.85	AS8781 Ooredoo Q.S.C.	`0.32ms` from Doha, QA
85.23.168.5	AS16086 DNA Oyj	`0.52ms` from Helsinki, FI
18.130.94.69	AS16509 Amazon.com, Inc.	`0.17ms` from London, GB
67.220.87.37	AS33333 objx.net, LLC	`0.30ms` from London, GB
130.194.6.101	AS56132 Monash University,	`2.03ms` from Melbourne, AU
69.248.89.85	AS7922 Comcast Cable Communications, LLC	`7.45ms` from New York City, US
60.75.216.245	AS17676 SoftBank Corp.	`4.83ms` from Osaka, JP
89.90.207.245	AS5410 Bouygues Telecom SA	`1.62ms` from Paris, FR
112.254.36.149	AS4837 CHINA UNICOM China169 Backbone	`2.36ms` from Qingdao, CN
23.6.252.5	AS16625 Akamai Technologies, Inc.	`2.91ms` from Seattle, US
175.253.235.133	AS4766 Korea Telecom	`1.92ms` from Seoul, KR
45.9.231.21	AS209033 CityNet LTD	`0.41ms` from Tashkent, UZ
116.208.98.69	AS4134 CHINANET-BACKBONE	`5.89ms` from Wuhan, CN
211.138.27.245	AS24445 Henan Mobile Communications Co.,Ltd	`1.52ms` from Zhengzhou, CN
73.174.53.101	AS7922 Comcast Cable Communications, LLC	`10.56ms` from Ashburn, US
175.0.237.229	AS4134 CHINANET-BACKBONE	`1.51ms` from Changsha, CN
156.80.20.5	AS393649 Booz Allen Hamilton Inc.	`0.92ms` from Dallas, US
108.249.179.85	AS7018 AT&T Enterprises, LLC	`2.84ms` from Dallas, US
87.150.216.213	AS3320 Deutsche Telekom AG	`3.20ms` from Duesseldorf, DE
79.209.103.245	AS3320 Deutsche Telekom AG	`10.55ms` from Frankfurt am Main, DE
34.103.149.5	AS396982 Google LLC	`1.69ms` from Frankfurt am Main, DE
125.179.42.5	AS17858 LG POWERCOMM	`5.69ms` from Incheon, 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 -m12 210.77.12.43

traceroute to 210.77.12.43 (210.77.12.43): 12 hops max, 52 byte packets

4 [AS174] 154.54.42.101 0.657 ms

5 [AS174] 154.54.0.6 149.077 ms

6 [AS174] 154.18.9.165 158.104 ms

7 [AS7497] 159.226.254.229 177.747 ms

8 [AS7497] 159.226.254.237 184.354 ms

9 [AS7497] 159.226.254.162 190.453 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On January 18th 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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