121.195.96.0/20

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 121.195.96.0/20

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
136.146.186.4	AS14340 Salesforce.com, Inc.	`0.68ms` from Ashburn, US
124.17.110.196	AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	`2.81ms` from Beijing, CN
212.200.1.4	AS8400 TELEKOM SRBIJA a.d.	`0.36ms` from Belgrade, RS
188.157.83.244	AS5483 Magyar Telekom Plc.	`9.40ms` from Budapest, HU
52.162.254.164	AS8075 Microsoft Corporation	`0.20ms` from Chicago, US
208.72.69.68	AS40284 Glenwood Springs Community Broadband Network	`4.54ms` from Denver, US
162.248.138.4	AS4474 TCT West, Inc.	`9.93ms` from Denver, US
76.133.205.68	AS7922 Comcast Cable Communications, LLC	`5.19ms` from Fremont, US
46.149.197.20	AS59371 Dimension Network & Communication Limited	`1.31ms` from Hong Kong, HK
90.198.240.244	AS5607 Sky UK Limited	`4.49ms` from London, GB
180.191.3.228	AS132199 Globe Telecom Inc.	`3.53ms` from Manila, PH
209.227.243.228	AS213224 Aruba S.p.A.	`1.13ms` from Milan, IT
129.152.19.52	AS31898 Oracle Corporation	`0.14ms` from Milan, IT
13.201.198.20	AS16509 Amazon.com, Inc.	`0.19ms` from Mumbai, IN
135.233.246.228	AS8075 Microsoft Corporation	`0.15ms` from San Antonio, US
138.75.180.164	AS4773 MobileOne Ltd. Mobile/Internet Service Provider Singapore	`3.19ms` from Singapore, SG
145.89.188.100	AS1103 SURF B.V.	`1.78ms` from Amsterdam, NL
149.117.134.52	AS7809 Synopsys Inc.	`3.37ms` from Amsterdam, NL
56.137.57.132	AS8987 Amazon Data Services Ireland Ltd	`0.26ms` from Boardman, US
203.57.183.4	AS7575 Australian Academic and Research Network (AARNet)	`2.57ms` from Brisbane, AU
102.41.94.180	AS8452 TE-AS	`4.08ms` from Cairo, EG
196.114.163.84	AS36925 MEDITELECOM	`14.14ms` from Casablanca, MA
207.211.177.132	AS31898 Oracle Corporation	`0.35ms` from Chicago, US
61.128.150.68	AS4134 CHINANET-BACKBONE	`1.12ms` from Chongqing, CN
220.192.104.196	AS4837 CHINA UNICOM China169 Backbone	`6.59ms` from Chongqing, 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 -m16 121.195.97.143

traceroute to 121.195.97.143 (121.195.97.143): 16 hops max, 52 byte packets

3 [AS6939] 184.104.196.250 6.988 ms

4 *

5 [AS6939] 184.105.80.14 24.557 ms

6 *

7 *

8 *

9 [AS4538] 101.4.114.181 274.929 ms

10 *

11 *

12 [AS4538] 101.4.112.98 267.039 ms

13 [AS4538] 101.4.113.229 275.413 ms

14 *

15 *

16 *

Measurement taken from

IPinfo ProbeNet in Tirana, AL

On December 6th 2025

What are IP address ranges?

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