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:         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 210.77.2.0/23

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

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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
103.126.5.103	AS136479 Cyber Telecom ISP	`0.42ms` from Amsterdam, NL
185.189.237.231	AS200069 MAILJET SAS	`4.44ms` from Amsterdam, NL
4.157.172.119	AS8075 Microsoft Corporation	`0.43ms` from Ashburn, US
185.92.226.39	AS34170 Aztelekom LLC	`0.40ms` from Baku, AZ
178.220.194.135	AS8400 TELEKOM SRBIJA a.d.	`4.65ms` from Belgrade, RS
168.61.86.167	AS8075 Microsoft Corporation	`0.16ms` from Dublin, IE
18.167.69.103	AS16509 Amazon.com, Inc.	`0.10ms` from Hong Kong, HK
64.47.0.151	AS19855 Masergy Communications, Inc.	`0.27ms` from Miami, US
79.20.161.167	AS3269 Telecom Italia S.p.A.	`2.01ms` from Milan, IT
44.198.111.119	AS14618 Amazon.com, Inc.	`0.22ms` from Reston, US
210.223.47.247	AS4766 Korea Telecom	`2.87ms` from Seoul, KR
212.5.135.135	AS8866 Vivacom Bulgaria EAD	`0.70ms` from Sofia, BG
182.117.43.135	AS4837 CHINA UNICOM China169 Backbone	`7.90ms` from Zhengzhou, CN
20.8.248.71	AS8075 Microsoft Corporation	`0.20ms` from Amsterdam, NL
20.93.246.23	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
73.117.30.7	AS7922 Comcast Cable Communications, LLC	`13.63ms` from Ashburn, US
60.10.54.23	AS4837 CHINA UNICOM China169 Backbone	`12.07ms` from Beijing, CN
79.215.241.167	AS3320 Deutsche Telekom AG	`2.32ms` from Berlin, DE
194.81.93.39	AS786 Jisc Services Limited	`7.64ms` from Chester, GB
178.251.227.71	AS34549 meerfarbig GmbH & Co. KG	`0.16ms` from Frankfurt am Main, DE
37.138.4.183	AS9145 EWE TEL GmbH	`3.89ms` from Hamburg, DE
115.73.188.71	AS7552 Viettel Group	`0.82ms` from Ho Chi Minh City, VN
5.152.213.87	AS20860 IOMART CLOUD SERVICES LIMITED	`3.14ms` from London, GB
98.253.95.71	AS7922 Comcast Cable Communications, LLC	`10.97ms` from Mount Prospect, US
72.188.241.151	AS33363 Charter Communications, Inc	`7.51ms` from Orlando, US

Traceroute

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

traceroute -a -n -q1 -m9 210.77.3.62

traceroute to 210.77.3.62 (210.77.3.62): 9 hops max, 52 byte packets

1 [AS15169] 108.170.231.40 1.698 ms

2 *

3 [AS3491] 63.223.17.242 211.166 ms

4 [AS3491] 63.220.198.25 195.755 ms

5 [AS7497] 159.226.254.229 232.984 ms

6 [AS7497] 159.226.254.237 232.66 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Dallas, US

On January 9th 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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