121.192.2.0/24

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 121.192.2.0/24

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

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Pingable IPs

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

IP Address	ASN	Details
121.192.2.136	AS4538 China Education and Research Network Center	`21.80ms` 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
128.8.150.248	AS27 University of Maryland	`2.70ms` from Ashburn, US
20.55.108.136	AS8075 Microsoft Corporation	`0.79ms` from Ashburn, US
73.68.130.88	AS7922 Comcast Cable Communications, LLC	`8.03ms` from Boston, US
98.206.74.56	AS7922 Comcast Cable Communications, LLC	`5.59ms` from Chicago, US
194.31.19.200	AS212587 Gemeinsame Kommunale Datenzentrale Recklinghausen Zweckverband	`2.49ms` from Duesseldorf, DE
131.220.208.120	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`4.06ms` from Frankfurt am Main, DE
43.141.61.104	AS45090 Shenzhen Tencent Computer Systems Company Limited	`4.25ms` from Guangzhou, CN
211.248.82.88	AS4766 Korea Telecom	`2.55ms` from Incheon, KR
116.120.98.120	AS9318 SK Broadband Co Ltd	`5.43ms` from Incheon, KR
59.150.236.24	AS9457 DREAMLINE CO.	`1.33ms` from Incheon, KR
14.1.195.104	AS45960 YTL COMMUNICATIONS SDN BHD	`1.97ms` from Kuala Lumpur, MY
37.25.121.216	AS31272 WildPark Co	`8.81ms` from Kyiv, UA
85.42.119.248	AS3269 Telecom Italia S.p.A.	`4.72ms` from Milan, IT
34.23.210.152	AS396982 Google LLC	`0.16ms` from Moncks Corner, US
153.155.212.184	AS4713 NTT DOCOMO BUSINESS,Inc.	`19.58ms` from Osaka, JP
187.0.184.88	AS28241 VERO S.A	`9.94ms` from Sao Paulo, BR
126.235.181.72	AS17676 SoftBank Corp.	`2.86ms` from Tokyo, JP
108.192.134.40	AS7018 AT&T Enterprises, LLC	`10.68ms` from Ashburn, US
175.155.61.88	AS4837 CHINA UNICOM China169 Backbone	`7.34ms` from Chengdu, CN
140.192.52.120	AS20130 Depaul University	`1.17ms` from Chicago, US
64.182.184.104	AS54489 CoreSpace, Inc.	`0.74ms` from Dallas, US
87.114.30.8	AS6871 Plusnet	`3.07ms` from Erith, GB
3.67.250.24	AS16509 Amazon.com, Inc.	`0.15ms` from Frankfurt am Main, DE
3.66.76.104	AS16509 Amazon.com, Inc.	`0.11ms` from Frankfurt am Main, DE
154.204.179.152	AS400619 AROSSCLOUD INC.	`0.89ms` 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 -f6 121.192.2.15

traceroute to 121.192.2.15 (121.192.2.15): 64 hops max, 52 byte packets

6 [AS4538] 219.224.103.177 5.284 ms

7 *

8 [AS4538] 219.224.103.217 4.638 ms

9 [AS4538] 101.4.117.46 9.147 ms

10 *

11 *

12 *

13 *

14 *

15 [AS4538] 121.192.2.15 32.693 ms

Measurement taken from

IPinfo ProbeNet in Shanghai, CN

On February 16th 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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