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

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

IP Address	ASN	Details
210.77.10.80	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.71ms` from Beijing, CN
210.77.11.205	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`3.45ms` 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.	`0.95ms` from Amsterdam, NL
86.34.136.85	AS9050 Orange Romania S.A.	`0.62ms` from Bucharest, RO
184.26.86.5	AS16625 Akamai Technologies, Inc.	`0.20ms` from Chennai, IN
47.46.38.165	AS20115 Charter Communications LLC	`10.12ms` from Chicago, US
47.44.199.21	AS20115 Charter Communications LLC	`3.75ms` from Dallas, US
18.66.72.5	AS16509 Amazon.com, Inc.	`0.41ms` from Delhi, IN
73.242.184.117	AS7922 Comcast Cable Communications, LLC	`10.59ms` from Denver, US
50.192.117.37	AS7922 Comcast Cable Communications, LLC	`10.19ms` from Flint, US
109.250.168.149	AS8881 1&1 Versatel GmbH	`9.11ms` from Frankfurt am Main, DE
64.217.158.117	AS7018 AT&T Enterprises, LLC	`4.35ms` from Houston, US
138.108.0.5	AS396290 Nielsen Consumer LLC	`3.89ms` from Indianapolis, US
42.242.42.165	AS4134 CHINANET-BACKBONE	`9.89ms` from Kunming, CN
76.89.127.69	AS20001 Charter Communications Inc	`6.56ms` from Los Angeles, US
46.72.129.149	AS12714 PJSC MegaFon	`9.36ms` from Moscow, RU
220.186.103.117	AS4134 CHINANET-BACKBONE	`10.35ms` from Nanchang, CN
104.37.189.21	AS19318 Interserver, Inc	`0.62ms` from New York City, US
18.228.162.133	AS16509 Amazon.com, Inc.	`0.15ms` from Osasco, BR
213.188.218.117	AS40509 Fly.io, Inc.	`0.09ms` from Osasco, BR
205.123.248.5	AS210 Utah Education Network	`1.91ms` from Salt Lake City, US
211.109.225.101	AS9318 SK Broadband Co Ltd	`1.56ms` from Seoul, KR
183.91.232.5	AS9976 Namincheon Brodcasting Co., Ltd.	`2.00ms` from Seoul, KR
218.202.243.133	AS24400 Shanghai Mobile Communications Co.,Ltd.	`2.80ms` from Shanghai, CN
126.9.174.117	AS17676 SoftBank Corp.	`3.62ms` from Tokyo, JP
119.243.233.101	AS2518 BIGLOBE Inc.	`2.31ms` from Tokyo, JP
72.12.147.85	AS812 Rogers Communications Canada Inc.	`5.24ms` from Toronto, CA

Traceroute

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

traceroute -a -n -q1 -f5 -m11 210.77.14.61

traceroute to 210.77.14.61 (210.77.14.61): 11 hops max, 52 byte packets

5 [AS3491] 63.220.198.25 329.053 ms

6 [AS7497] 159.226.254.229 370.294 ms

7 [AS7497] 159.226.254.237 370.322 ms

8 [AS7497] 159.226.254.162 370.367 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Accra, GH

On December 20th 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.

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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