121.192.40.0/22

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	121.192.0.0/16
Registry	APNIC
ID	SHR-CERNET

WHOIS Details

inetnum:        121.192.0.0 - 121.192.255.255
netname:        SHR-CERNET
descr:          China Education and Research Network
descr:          Shanghai 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:  2020-09-03T09:16:25Z
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:          121.192.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.192.40.0/22

Range	ASN	Company	Num of IPs
121.192.0.0/16	AS4538	China Education and Research Network	65,536

Nearby Ranges

BGP prefixes that overlap with 121.192.0.0/16

Range	ASN	Company	Num of IPs
121.192.0.0/16	AS4538	China Education and Research Network	65,536

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

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

IP Address	ASN	Details
121.192.40.110	AS4538 China Education and Research Network Center	`17.47ms` from Fuzhou, 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
108.39.121.102	AS701 Verizon Business	`7.56ms` from Ashburn, US
73.249.121.102	AS7922 Comcast Cable Communications, LLC	`6.02ms` from Boston, US
222.208.50.70	AS4134 CHINANET-BACKBONE	`5.95ms` from Chengdu, CN
37.81.42.150	AS3320 Deutsche Telekom AG	`14.72ms` from Duesseldorf, DE
87.166.154.118	AS3320 Deutsche Telekom AG	`7.69ms` from Frankfurt am Main, DE
121.14.139.86	AS134763 CHINANET Guangdong province network	`2.91ms` from Guangzhou, CN
162.252.47.214	AS54841 TELUS Communications Inc.	`13.99ms` from Kelowna, CA
95.188.78.54	AS12389 PJSC Rostelecom	`0.68ms` from Krasnoyarsk, RU
46.61.143.70	AS12389 PJSC Rostelecom	`0.63ms` from Krasnoyarsk, RU
109.86.131.134	AS13188 CONTENT DELIVERY NETWORK LTD	`0.71ms` from Kyiv, UA
179.116.9.166	AS26599 TELEFÔNICA BRASIL S.A	`3.82ms` from Osasco, BR
177.192.102.54	AS28573 Claro NXT Telecomunicacoes Ltda	`0.84ms` from Rio de Janeiro, BR
63.193.208.6	AS7018 AT&T Enterprises, LLC	`10.51ms` from San Jose, US
222.111.77.150	AS4766 Korea Telecom	`1.33ms` from Seoul, KR
218.155.20.22	AS4766 Korea Telecom	`1.41ms` from Seoul, KR
1.116.27.6	AS45090 Shenzhen Tencent Computer Systems Company Limited	`0.99ms` from Shanghai, CN
105.99.80.86	AS36947 Telecom Algeria	`9.19ms` from Valencia, ES
24.99.215.22	AS7922 Comcast Cable Communications, LLC	`4.91ms` from Atlanta, US
84.0.78.198	AS5483 Magyar Telekom Plc.	`6.10ms` from Budapest, HU
148.70.81.86	AS45090 Shenzhen Tencent Computer Systems Company Limited	`0.90ms` from Chengdu, CN
24.231.251.54	AS20115 Charter Communications LLC	`8.24ms` from Chicago, US
220.241.174.70	AS4515 PCCW IMS Ltd (PCCW Business Internet Access)	`0.91ms` from Hong Kong, HK
211.216.148.70	AS4766 Korea Telecom	`0.78ms` from Incheon, KR
148.71.20.166	AS12353 Vodafone Portugal	`2.46ms` from Lisbon, PT
199.180.15.6	AS54778 Broadway Technology LLC	`0.60ms` 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 -f7 121.192.40.254

traceroute to 121.192.40.254 (121.192.40.254): 64 hops max, 52 byte packets

7 [AS4538] 219.224.103.177 13.408 ms

8 *

9 [AS4538] 219.224.103.217 9.93 ms

10 [AS4538] 101.4.117.46 15.291 ms

11 *

12 *

13 *

14 *

15 [AS4538] 121.192.40.254 22.896 ms

Measurement taken from

IPinfo ProbeNet in Nanjing, CN

On January 9th 2026

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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