121.192.30.0/23

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 121.192.30.0/23

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

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

IP Address	ASN	Details
121.192.31.44	AS4538 China Education and Research Network Center	`7.41ms` from Hangzhou, CN
121.192.30.33	AS4538 China Education and Research Network Center	`7.57ms` 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
24.131.216.55	AS7922 Comcast Cable Communications, LLC	`11.79ms` from Ashburn, US
74.193.5.39	AS19108 Optimum	`14.96ms` from Dallas, US
59.178.88.71	AS9829 National Internet Backbone	`9.96ms` from Delhi, IN
13.74.118.71	AS8075 Microsoft Corporation	`0.21ms` from Dublin, IE
110.83.1.247	AS4134 CHINANET-BACKBONE	`6.02ms` from Fuzhou, CN
113.169.49.215	AS45899 VNPT Corp	`2.99ms` from Ho Chi Minh City, VN
81.53.22.215	AS3215 Orange S.A.	`11.99ms` from Paris, FR
152.92.146.231	AS2715 Fundação Carlos Chagas Filho de Amparo a Pesquisa	`1.29ms` from Rio de Janeiro, BR
59.123.27.167	AS3462 Data Communication Business Group	`2.87ms` from Taichung, TW
118.238.57.103	AS2527 Sony Network Communications Inc.	`1.69ms` from Tokyo, JP
20.233.154.119	AS8075 Microsoft Corporation	`3.83ms` from Al Fujairah City, AE
158.93.190.135	AS398060 Augusta University	`6.28ms` from Atlanta, US
49.232.22.183	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.75ms` from Beijing, CN
35.239.148.199	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
178.166.1.71	AS12353 Vodafone Portugal	`7.44ms` from Lisbon, PT
52.113.206.215	AS8075 Microsoft Corporation	`1.79ms` from San Antonio, US
201.122.148.55	AS8151 UNINET	`4.03ms` from Santiago de Queretaro, MX
73.19.7.7	AS7922 Comcast Cable Communications, LLC	`9.58ms` from Seattle, US
47.100.121.23	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.03ms` from Shanghai, CN
89.139.164.39	AS1680 Cellcom Fixed Line Communication L.P	`4.88ms` from Tel Aviv, IL
142.250.19.215	AS15169 Google LLC	`0.87ms` from Tokyo, JP
173.34.27.247	AS812 Rogers Communications Canada Inc.	`1.35ms` from Toronto, CA
131.202.117.231	AS611 NB-PEI Educational Computer Network	`13.46ms` from Beauharnois, CA
78.92.240.151	AS5483 Magyar Telekom Plc.	`2.17ms` from Budapest, HU
217.145.98.71	AS16316 TMT GmbH & Co. KG	`6.72ms` from Frankfurt am Main, DE

Traceroute

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

traceroute -a -n -q1 -f6 121.192.30.254

traceroute to 121.192.30.254 (121.192.30.254): 64 hops max, 52 byte packets

6 [AS4538] 101.4.131.17 6.235 ms

7 [AS4538] 219.224.102.217 7.488 ms

8 *

9 *

10 [AS4538] 210.32.127.14 7.098 ms

11 [AS4538] 210.32.123.226 20.949 ms

12 [AS4538] 121.192.30.254 7.887 ms

Measurement taken from

IPinfo ProbeNet in Hangzhou, CN

On March 20th 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.

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