210.77.2.0/23

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	210.77.0.0/19
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:         [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:          210.77.0.0/19
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 210.77.2.0/23

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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
173.244.246.39	AS22709 North State Telephone, LLC	`13.22ms` from Atlanta, US
154.8.143.7	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.75ms` from Beijing, CN
141.53.122.71	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`8.10ms` from Berlin, DE
86.148.86.247	AS2856 British Telecommunications PLC	`4.33ms` from Erith, GB
188.212.7.135	AS203061 UAB code200	`0.52ms` from Frankfurt am Main, DE
87.168.173.39	AS3320 Deutsche Telekom AG	`2.90ms` from Frankfurt am Main, DE
27.75.86.119	AS7552 Viettel Group	`3.96ms` from Ho Chi Minh City, VN
124.29.222.7	AS9541 Cyber Internet Services (Pvt) Ltd.	`18.71ms` from Karachi, PK
142.56.29.55	AS15108 Allo Communications LLC	`6.35ms` from Lincoln, US
122.52.54.119	AS9299 Philippine Long Distance Telephone Company	`2.55ms` from Manila, PH
92.151.165.119	AS3215 Orange S.A.	`4.11ms` from Marseille, FR
64.47.0.151	AS19855 Masergy Communications, Inc.	`0.26ms` from Miami, US
110.42.62.23	AS136188 NINGBO, ZHEJIANG Province, P.R.China.	`0.14ms` from Ningbo, CN
179.119.45.199	AS26599 TELEFÔNICA BRASIL S.A	`1.24ms` from Osasco, BR
201.227.97.247	AS11556 Cable & Wireless Panama	`8.89ms` from Panama, PA
27.214.49.87	AS4837 CHINA UNICOM China169 Backbone	`7.08ms` from Qingdao, CN
84.237.249.247	AS12578 SIA Tet	`0.67ms` from Riga, LV
79.18.87.183	AS3269 Telecom Italia S.p.A.	`9.93ms` from Rome, IT
190.230.186.231	AS7303 Telecom Argentina S.A.	`3.34ms` from Rosario, AR
58.38.12.199	AS4812 China Telecom (Group)	`3.15ms` from Shanghai, CN
180.14.61.167	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.84ms` from Tokyo, JP
73.10.0.39	AS7922 Comcast Cable Communications, LLC	`9.51ms` from Ashburn, US
98.213.100.231	AS7922 Comcast Cable Communications, LLC	`5.16ms` from Chicago, US
98.199.208.87	AS7922 Comcast Cable Communications, LLC	`4.42ms` from Houston, US
217.45.145.55	AS2856 British Telecommunications PLC	`2.92ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -m10 210.77.3.245

traceroute to 210.77.3.245 (210.77.3.245): 10 hops max, 52 byte packets

1 [AS15169] 142.251.60.182 6.874 ms

2 *

3 [AS3491] 63.223.17.242 220.958 ms

4 [AS3491] 63.220.198.25 225.84 ms

5 *

6 [AS7497] 159.226.254.237 258.444 ms

7 [AS7497] 159.226.254.162 258.587 ms

8 *

9 *

10 *

Measurement taken from

IPinfo ProbeNet in Ashburn, US

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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