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:         [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 210.77.8.0/21

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

Read more

Pingable IPs

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

IP Address	ASN	Details
210.77.10.96	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.45ms` from Beijing, CN
210.77.11.205	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`4.10ms` 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
128.63.83.37	AS13 Headquarters, USAISC	`2.68ms` from Ashburn, US
73.81.72.85	AS7922 Comcast Cable Communications, LLC	`8.82ms` from Ashburn, US
20.231.236.149	AS8075 Microsoft Corporation	`0.33ms` from Ashburn, US
181.127.173.245	AS23201 Telecel S.A.	`12.23ms` from Asuncion, PY
139.59.54.229	AS14061 DigitalOcean, LLC	`0.21ms` from Bengaluru, IN
35.87.76.53	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
34.208.26.213	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
18.197.90.181	AS16509 Amazon.com, Inc.	`0.17ms` from Frankfurt am Main, DE
61.33.159.133	AS3786 LG DACOM Corporation	`1.64ms` from Incheon, KR
180.71.85.5	AS9318 SK Broadband Co Ltd	`2.01ms` from Incheon, KR
212.98.239.197	AS15924 Vodafone Net Iletisim Hizmetler AS	`2.67ms` from Istanbul, TR
75.223.148.85	AS6167 Verizon Business	`10.69ms` from Los Angeles, US
217.61.78.165	AS29119 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL	`7.39ms` from Madrid, ES
104.163.159.165	AS1403 EBOX	`1.48ms` from Montreal, CA
139.103.40.229	AS611 NB-PEI Educational Computer Network	`15.66ms` from Montreal, CA
60.108.50.53	AS17676 SoftBank Corp.	`3.94ms` from Osaka, JP
122.28.110.181	AS4713 NTT DOCOMO BUSINESS,Inc.	`1.02ms` from Osaka, JP
52.156.97.21	AS8075 Microsoft Corporation	`0.30ms` from Quincy, US
93.58.162.53	AS12874 Fastweb SpA	`1.27ms` from Rome, IT
40.118.241.117	AS8075 Microsoft Corporation	`0.56ms` from San Jose, US
201.163.3.149	AS11172 Alestra, S. de R.L. de C.V.	`3.27ms` from Santiago de Queretaro, MX
118.51.38.149	AS4766 Korea Telecom	`2.08ms` from Seoul, KR
165.21.104.181	AS3758 SingNet	`0.71ms` from Singapore, SG
34.40.222.85	AS396982 Google LLC	`0.11ms` from Sydney, AU
203.75.170.133	AS3462 Data Communication Business Group	`4.64ms` from Taichung, TW

Traceroute

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

traceroute -a -n -q1 -f5 -m14 210.77.12.10

traceroute to 210.77.12.10 (210.77.12.10): 14 hops max, 52 byte packets

5 [AS4837] 42.49.199.245 1.435 ms

6 *

7 *

8 *

9 [AS4837] 219.158.39.2 34.515 ms

10 [AS7497] 159.226.254.69 33.901 ms

11 [AS7497] 159.226.254.158 34.184 ms

12 *

13 *

14 *

Measurement taken from

IPinfo ProbeNet in Zhangjiajie, CN

On January 30th 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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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