121.195.180.0/22

AS4538 · China Education and Research Network Center

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	121.194.0.0/15
Registry	APNIC
ID	BJR-CERNET

WHOIS Details

inetnum:        121.194.0.0 - 121.195.255.255
netname:        BJR-CERNET
descr:          China Education and Research Network
descr:          Beijing Regional Network
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        origin AS4538
remarks:        confederation
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:22Z
source:         APNIC

irt:            IRT-CERNET-AP
address:        Network Research Center,
address:        Main Bldg, Tsinghua Univ
address:        Beijing 100084, China
phone:          +86-10-62784301
fax-no:         +86-10-62785933
e-mail:         abuse@cernet.edu.cn
abuse-mailbox:  abuse@cernet.edu.cn
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        abuse@cernet.edu.cn was validated on 2025-08-15
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-11-18T00:26:28Z
source:         APNIC

role:           ABUSE CERNETAP
country:        ZZ
address:        Network Research Center,
address:        Main Bldg, Tsinghua Univ
address:        Beijing 100084, China
phone:          +86-10-62784301
e-mail:         abuse@cernet.edu.cn
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        abuse@cernet.edu.cn was validated on 2025-08-15
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-15T09:38:28Z
source:         APNIC

role:           CERNET Helpdesk
address:        CERNET Center
address:        Beijing 100084, China
country:        CN
phone:          +86-10-6278-4049
fax-no:         +86-10-6278-5933
e-mail:         helpdesk@cernet.edu.cn
remarks:        abuse@cernet.edu.cn
admin-c:        XL1-CN
tech-c:         SZ2-AP
nic-hdl:        CER-AP
mnt-by:         MAINT-CERNET-AP
last-modified:  2020-09-03T09:14:12Z
source:         APNIC

route:          121.194.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.195.180.0/22

Range	ASN	Company	Num of IPs
121.194.0.0/15	AS4538	China Education and Research Network	131,072

Nearby Ranges

BGP prefixes that overlap with 121.195.0.0/16

Range	ASN	Company	Num of IPs
121.194.0.0/15	AS4538	China Education and Research Network	131,072

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

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
209.155.244.70	AS7029 Windstream Communications LLC	`0.52ms` from Atlanta, US
54.202.159.118	AS16509 Amazon.com, Inc.	`0.18ms` from Boardman, US
221.177.172.118	AS9808 China Mobile Communications Group Co., Ltd.	`1.60ms` from Changsha, CN
104.185.133.86	AS7018 AT&T Enterprises, LLC	`6.60ms` from Chicago, US
93.131.204.230	AS6805 Telefonica Germany GmbH & Co.OHG	`2.80ms` from Duesseldorf, DE
90.220.239.214	AS5607 Sky UK Limited	`6.02ms` from London, GB
69.202.244.118	AS12271 Charter Communications Inc	`4.05ms` from New York City, US
180.144.49.150	AS17511 OPTAGE Inc.	`1.54ms` from Osaka, JP
211.232.163.102	AS17877 KX NexG Co., LTD	`2.82ms` from Seoul, KR
1.163.153.6	AS3462 Data Communication Business Group	`1.46ms` from Taipei, TW
43.235.29.86	AS17506 ARTERIA Networks Corporation	`0.97ms` from Tokyo, JP
99.215.55.54	AS812 Rogers Communications Canada Inc.	`9.77ms` from Toronto, CA
37.156.31.214	AS50810 Mobin Net Communication Company (Private Joint Stock)	`18.31ms` from Yerevan, AM
109.177.9.38	AS5384 Emirates Internet	`2.62ms` from Al Fujairah City, AE
62.131.180.70	AS1136 KPN B.V.	`2.43ms` from Amsterdam, NL
49.4.11.214	AS55990 Huawei Cloud Service data center	`3.44ms` from Beijing, CN
51.225.20.22	AS16509 Amazon.com, Inc.	`0.99ms` from Berlin, DE
50.203.55.70	AS7922 Comcast Cable Communications, LLC	`4.94ms` from Boston, US
74.218.70.6	AS10796 Charter Communications Inc	`2.14ms` from Columbus, US
136.119.189.214	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
174.174.194.246	AS7922 Comcast Cable Communications, LLC	`13.84ms` from Flint, US
95.222.16.150	AS3209 Vodafone GmbH	`7.69ms` from Frankfurt am Main, DE
14.198.6.70	AS9269 Hong Kong Broadband Network Ltd.	`1.34ms` from Hong Kong, HK
209.93.22.134	AS6871 Plusnet	`15.32ms` from London, GB
73.112.124.214	AS7922 Comcast Cable Communications, LLC	`5.59ms` from New York City, US

Traceroute

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

traceroute -a -n -q1 -f2 -m14 121.195.183.125

traceroute to 121.195.183.125 (121.195.183.125): 14 hops max, 52 byte packets

2 [AS49770] 95.143.207.229 5.571 ms

3 *

4 *

5 *

6 [AS6939] 184.104.199.181 288.081 ms

7 *

8 [AS4538] 101.4.114.181 235.659 ms

9 *

10 *

11 [AS4538] 101.4.113.201 238.257 ms

12 *

13 *

14 *

Measurement taken from

IPinfo ProbeNet in Hudiksvall, SE

On November 14th 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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales