121.192.36.0/22

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 Center,
address:        FIT-3-220, 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:        abuse@cernet.edu.cn was validated on 2026-03-05
mnt-by:         MAINT-CERNET-AP
last-modified:  2026-03-05T06:39:56Z
source:         APNIC

role:           ABUSE CERNETAP
country:        ZZ
address:        Network Center,
address:        FIT-3-220, 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 2026-03-05
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2026-03-05T06:40:20Z
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 121.192.36.0/22

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

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Useful for Cybersecurity

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Pingable IPs

1,022 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
121.192.39.255	AS4538 China Education and Research Network Center	`10.12ms` from Hangzhou, CN
121.192.36.1	AS4538 China Education and Research Network Center	`9.98ms` from Hangzhou, CN
121.192.38.94	AS4538 China Education and Research Network Center	`12.48ms` from Hangzhou, CN
121.192.37.142	AS4538 China Education and Research Network Center	`12.25ms` from Hangzhou, 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
94.177.184.6	AS31034 Aruba S.p.A.	`0.27ms` from Arezzo, IT
201.179.171.150	AS22927 Telefonica de Argentina	`7.83ms` from Buenos Aires, AR
212.184.183.22	AS3320 Deutsche Telekom AG	`2.02ms` from Duesseldorf, DE
193.237.158.118	AS5378 Vodafone Limited	`2.06ms` from Edinburgh, GB
14.37.114.246	AS4766 Korea Telecom	`0.92ms` from Incheon, KR
178.225.59.134	AS31615 Odido Netherlands B.V.	`10.97ms` from Naaldwijk, NL
92.133.20.6	AS3215 Orange S.A.	`10.68ms` from Paris, FR
94.198.3.86	AS48148 SVIAZATOMINFORM, Ltd. Company	`13.78ms` from Samara, RU
47.251.103.230	AS45102 Alibaba (US) Technology Co., Ltd.	`0.39ms` from Santa Clara, US
205.250.46.230	AS852 TELUS Communications Inc.	`4.21ms` from Seattle, US
217.65.37.102	AS20645 PurePeak Ltd.	`0.79ms` from Tel Aviv, IL
59.108.162.182	AS4847 China Networks Inter-Exchange	`13.12ms` from Tianjin, CN
125.192.1.118	AS2518 BIGLOBE Inc.	`2.33ms` from Tokyo, JP
50.100.81.150	AS577 Bell Canada	`7.09ms` from Toronto, CA
41.205.134.246	AS36996 Telecom Namibia	`1.36ms` from Windhoek, NA
181.123.110.102	AS23201 Telecel S.A.	`9.08ms` from Asuncion, PY
101.200.153.102	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.89ms` from Beijing, CN
52.12.92.70	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
68.12.149.22	AS22773 Cox Communications Inc.	`7.46ms` from Dallas, US
50.209.224.118	AS7922 Comcast Cable Communications, LLC	`5.84ms` from Denver, US
91.11.225.134	AS3320 Deutsche Telekom AG	`2.06ms` from Hamburg, DE
45.197.38.246	AS9294 GNET INC.	`0.89ms` from Hong Kong, HK
47.196.199.134	AS5650 Frontier Communications of America, Inc.	`6.75ms` from Miami, US
78.123.162.38	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`14.28ms` from Paris, FR
162.234.3.102	AS7018 AT&T Enterprises, LLC	`3.91ms` from San Jose, US

Traceroute

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

traceroute -a -n -q1 -f6 121.192.39.255

traceroute to 121.192.39.255 (121.192.39.255): 64 hops max, 52 byte packets

6 [AS37963] 121.0.31.146 6.553 ms

7 [AS4538] 219.224.102.217 8.049 ms

8 *

9 *

10 *

11 *

12 [AS4538] 121.192.39.255 10.633 ms

Measurement taken from

IPinfo ProbeNet in Hangzhou, CN

On April 5th 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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