125.221.12.0/23

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	125.216.0.0/13
Registry	APNIC
ID	WHR-CERNET

WHOIS Details

inetnum:        125.220.0.0 - 125.221.255.255
netname:        WHR-CERNET
descr:          China Education and Research Network
descr:          Wuhan 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:         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 2025-01-22
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-01-22T13:47:43Z
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 2025-01-22
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-01-22T16:25:45Z
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:          125.221.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 125.221.12.0/23

Range	ASN	Company	Num of IPs
125.216.0.0/13	AS4538	China Education and Research Network	524,288

Nearby Ranges

BGP prefixes that overlap with 125.221.0.0/16

Range	ASN	Company	Num of IPs
125.216.0.0/13	AS4538	China Education and Research Network	524,288
125.221.160.0/19	AS4538	China Education and Research Network	8,192
125.221.64.0/19	AS4538	China Education and Research Network	8,192
125.221.96.0/20	AS4538	China Education and Research Network	4,096
125.221.224.0/20	AS4538	China Education and Research Network	4,096
125.221.192.0/20	AS4538	China Education and Research Network	4,096
125.221.48.0/20	AS4538	China Education and Research Network	4,096
125.221.112.0/20	AS4538	China Education and Research Network	4,096
125.221.32.0/21	AS4538	China Education and Research Network	2,048
125.221.208.0/21	AS4538	China Education and Research Network	2,048
125.221.192.0/21	AS4538	China Education and Research Network	2,048
125.221.128.0/22	AS4538	China Education and Research Network	1,024
125.221.16.0/22	AS4538	China Education and Research Network	1,024
125.221.242.0/23	AS4538	China Education and Research Network	512
125.221.8.0/23	AS4538	China Education and Research Network	512
125.221.216.0/23	AS4538	China Education and Research Network	512
125.221.244.0/23	AS4538	China Education and Research Network	512
125.221.240.0/23	AS4538	China Education and Research Network	512
125.221.10.0/23	AS4538	China Education and Research Network	512
125.221.40.0/23	AS4538	China Education and Research Network	512
125.221.250.0/23	AS4538	China Education and Research Network	512
125.221.30.0/23	AS4538	China Education and Research Network	512
125.221.252.0/23	AS4538	China Education and Research Network	512
125.221.4.0/23	AS4538	China Education and Research Network	512
125.221.218.0/23	AS4538	China Education and Research Network	512
125.221.220.0/23	AS4538	China Education and Research Network	512
125.221.254.0/23	AS4538	China Education and Research Network	512
125.221.248.0/23	AS4538	China Education and Research Network	512
125.221.2.0/23	AS4538	China Education and Research Network	512
125.221.42.0/23	AS4538	China Education and Research Network	512
125.221.200.0/23	AS4538	China Education and Research Network	512
125.221.14.0/23	AS4538	China Education and Research Network	512
125.221.44.0/23	AS4538	China Education and Research Network	512
125.221.20.0/24	AS4538	China Education and Research Network	256
125.221.40.0/24	AS4538	China Education and Research Network	256
125.221.21.0/24	AS4538	China Education and Research Network	256

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

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

IP Address	ASN	Details
125.221.12.1	AS4538 China Education and Research Network Center	2.09ms from Wuhan, 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
118.93.47.183	AS9500 One New Zealand Group Limited	2.19ms from Auckland, NZ
187.58.148.183	AS18881 TELEFÔNICA BRASIL S.A	7.71ms from Curitiba, BR
191.247.50.103	AS22085 Claro S/A	14.18ms from Fortaleza, BR
217.84.186.39	AS3320 Deutsche Telekom AG	9.52ms from Frankfurt am Main, DE
93.202.35.231	AS3320 Deutsche Telekom AG	9.38ms from Frankfurt am Main, DE
115.192.61.183	AS4134 CHINANET-BACKBONE	5.72ms from Hangzhou, CN
87.246.112.231	AS12703 Pulsant (Scotland) Ltd	0.74ms from London, GB
18.168.150.215	AS16509 Amazon.com, Inc.	0.65ms from London, GB
47.151.247.231	AS5650 Frontier Communications of America, Inc.	2.42ms from Los Angeles, US
158.23.82.103	AS8075 Microsoft Corporation	0.46ms from Santiago de Queretaro, MX
219.255.142.215	AS9318 SK Broadband Co Ltd	1.54ms from Seoul, KR
111.241.91.103	AS3462 Data Communication Business Group	1.06ms from Taipei, TW
52.148.249.247	AS8075 Microsoft Corporation	0.21ms from Amsterdam, NL
94.67.231.199	AS6799 Ote SA (Hellenic Telecommunications Organisation)	6.60ms from Athens, GR
98.253.159.71	AS7922 Comcast Cable Communications, LLC	3.14ms from Chicago, US
80.171.174.71	AS6805 Telefonica Germany GmbH & Co.OHG	3.52ms from Duesseldorf, DE
23.230.153.135	AS44477 PQ HOSTING PLUS S.R.L.	0.21ms from Frankfurt am Main, DE
54.36.193.183	AS16276 OVH SAS	0.15ms from Gravelines, FR
107.216.236.247	AS7018 AT&T Enterprises, LLC	8.66ms from Houston, US
46.26.127.167	AS12430 VODAFONE ESPANA S.A.U.	7.88ms from Madrid, ES
2.138.117.199	AS3352 TELEFONICA DE ESPANA S.A.U.	1.38ms from Madrid, ES
46.255.97.103	AS42358 Insys LLC	16.58ms from Moscow, RU
58.169.17.87	AS1221 Telstra Limited	10.98ms from Perth, AU
70.162.103.231	AS22773 Cox Communications Inc.	4.69ms from Phoenix, US
46.245.196.119	AS31229 Beyond.pl sp. z o.o.	0.50ms from Poznan, PL

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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