210.77.0.0/21

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 210.77.0.0/21

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

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
210.77.1.78	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`4.96ms` 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
193.121.152.197	AS5432 Proximus NV	`2.02ms` from Brussels, BE
3.252.175.133	AS16509 Amazon.com, Inc.	`1.09ms` from Dublin, IE
99.81.190.213	AS16509 Amazon.com, Inc.	`0.19ms` from Dublin, IE
84.250.44.245	AS1759 Telia Finland Oyj	`6.56ms` from Helsinki, FI
210.1.120.37	AS9299 Philippine Long Distance Telephone Company	`19.55ms` from Manila, PH
151.40.119.133	AS1267 WIND TRE S.P.A.	`8.56ms` from Milan, IT
69.193.176.245	AS12271 Charter Communications Inc	`1.73ms` from New York City, US
189.52.38.229	AS4230 CLARO S.A.	`0.19ms` from Porto Alegre, BR
35.171.243.229	AS14618 Amazon.com, Inc.	`0.22ms` from Reston, US
211.33.24.245	AS9318 SK Broadband Co Ltd	`5.29ms` from Seoul, KR
133.114.120.101	AS2527 Sony Network Communications Inc.	`1.39ms` from Tokyo, JP
168.92.234.149	AS62728 VELOCITY, A MANAGED SERVICES COMPANY	`0.19ms` from Atlanta, US
86.127.148.117	AS8708 DIGI ROMANIA S.A.	`1.17ms` from Bucharest, RO
97.223.106.37	AS6167 Verizon Business	`10.36ms` from Chicago, US
64.28.96.245	AS11320 LightEdge Solutions	`6.55ms` from Dallas, US
123.27.96.37	AS45899 VNPT Corp	`2.09ms` from Hanoi, VN
18.60.76.149	AS16509 Amazon.com, Inc.	`1.51ms` from Hyderabad, IN
103.182.159.149	AS140158 Net Access Internet India Pvt Ltd	`2.54ms` from Mumbai, IN
71.168.192.117	AS701 Verizon Business	`8.23ms` from New York City, US
82.57.134.85	AS3269 Telecom Italia S.p.A.	`14.13ms` from Rome, IT
84.204.63.37	AS20632 PJSC MegaFon	`1.23ms` from Saint Petersburg, RU
69.144.220.245	AS33588 Charter Communications LLC	`15.95ms` from Seattle, US
112.65.92.69	AS17621 China Unicom Shanghai network	`1.93ms` from Shanghai, CN
222.75.134.197	AS4134 CHINANET-BACKBONE	`3.06ms` from Zhongwei, CN
101.74.90.133	AS4837 CHINA UNICOM China169 Backbone	`9.80ms` from Beijing, CN

Traceroute

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

traceroute -a -n -q1 -f3 -m10 210.77.4.152

traceroute to 210.77.4.152 (210.77.4.152): 10 hops max, 52 byte packets

3 [AS3491] 63.222.113.78 38.682 ms

4 [AS3491] 63.220.198.25 37.996 ms

5 [AS7497] 159.226.254.229 70.533 ms

6 [AS7497] 159.226.254.237 70.537 ms

7 [AS7497] 159.226.254.162 70.584 ms

8 *

9 *

10 *

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 6th 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.

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