121.195.180.0/22

AS4538 · China Education and Research Network Center

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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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        [email protected] 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:         [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        [email protected] was validated on 2025-08-15
abuse-mailbox:  [email protected]
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:         [email protected]
remarks:        [email protected]
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:          121.195.0.0/16
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

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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
128.199.52.134	AS14061 DigitalOcean, LLC	`0.24ms` from Amsterdam, NL
194.7.156.166	AS702 Verizon Business	`4.19ms` from Amsterdam, NL
199.19.68.182	AS14244 NSI Hosting	`0.26ms` from Ashburn, US
69.243.100.6	AS7922 Comcast Cable Communications, LLC	`7.34ms` from Ashburn, US
46.198.237.22	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	`5.16ms` from Athens, GR
12.55.225.86	AS7018 AT&T Enterprises, LLC	`0.34ms` from Atlanta, US
44.227.17.230	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
86.110.231.86	AS29405 VNET a.s.	`0.31ms` from Bratislava, SK
65.255.187.166	AS11260 EastLink	`1.87ms` from Calgary, CA
47.244.34.118	AS45102 Alibaba (US) Technology Co., Ltd.	`0.73ms` from Hong Kong, HK
75.80.213.150	AS20001 Charter Communications Inc	`8.51ms` from Honolulu, US
180.111.255.102	AS134756 CHINANET Nanjing Jishan IDC network	`4.29ms` from Huai'an, CN
64.65.223.6	AS7029 Windstream Communications LLC	`0.19ms` from San Jose, US
18.244.70.166	AS16509 Amazon.com, Inc.	`0.59ms` from Seoul, KR
163.180.62.198	AS17870 Kyung Hee University	`2.50ms` from Seoul, KR
118.81.34.150	AS4837 CHINA UNICOM China169 Backbone	`2.49ms` from Taiyuan, CN
221.242.251.54	AS17506 ARTERIA Networks Corporation	`0.96ms` from Tokyo, JP
70.187.71.230	AS22773 Cox Communications Inc.	`19.22ms` from Ashburn, US
12.91.149.246	AS7018 AT&T Enterprises, LLC	`0.64ms` from Atlanta, US
50.206.107.150	AS7922 Comcast Cable Communications, LLC	`1.42ms` from Atlanta, US
120.53.232.38	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.76ms` from Beijing, CN
187.155.83.38	AS8151 UNINET	`12.48ms` from Cancún, MX
34.170.165.54	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
51.91.183.118	AS16276 OVH SAS	`0.06ms` from Gravelines, FR
125.214.203.86	AS4515 PCCW IMS Ltd (PCCW Business Internet Access)	`1.45ms` from Hong Kong, HK

Traceroute

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

traceroute -a -n -q1 -f4 -m14 121.195.181.113

traceroute to 121.195.181.113 (121.195.181.113): 14 hops max, 52 byte packets

4 [AS4134] 42.203.78.65 0.274 ms

5 [AS4134] 219.149.114.65 2.683 ms

6 [AS4134] 219.148.213.197 7.164 ms

7 *

8 *

9 [AS4134] 202.97.118.122 22.543 ms

10 *

11 [AS4538] 101.4.113.234 19.264 ms

12 *

13 *

14 *

Measurement taken from

IPinfo ProbeNet in Liaoyang, CN

On December 6th 2025

What are IP address ranges?

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