125.221.112.0/20

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 125.221.112.0/20

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
125.221.32.0/21	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
125.221.12.0/23	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

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
134.209.196.4	AS14061 DigitalOcean, LLC	0.23ms from Amsterdam, NL
178.40.110.100	AS6855 Slovak Telekom, a.s.	7.84ms from Bratislava, SK
76.131.2.4	AS7922 Comcast Cable Communications, LLC	9.47ms from Denver, US
68.41.142.132	AS7922 Comcast Cable Communications, LLC	11.30ms from Detroit, US
2.120.21.20	AS5607 Sky UK Limited	2.00ms from London, GB
79.9.16.164	AS3269 Telecom Italia S.p.A.	4.97ms from Milan, IT
90.91.238.4	AS3215 Orange S.A.	1.58ms from Paris, FR
60.101.203.84	AS17676 SoftBank Corp.	3.29ms from Tokyo, JP
97.156.119.116	AS6167 Verizon Business	13.77ms from Chicago, US
34.245.244.20	AS16509 Amazon.com, Inc.	0.17ms from Dublin, IE
68.48.69.68	AS7922 Comcast Cable Communications, LLC	9.99ms from Flint, US
103.196.140.4	AS21734 Trading Technologies Intl, Inc.	1.18ms from Sydney, AU
68.183.196.196	AS14061 DigitalOcean, LLC	0.27ms from Toronto, CA
196.218.11.148	AS8452 TE-AS	4.65ms from Cairo, EG
24.64.65.20	AS6327 Shaw Communications Inc.	8.41ms from Calgary, CA
196.119.82.36	AS36925 MEDITELECOM	3.72ms from Casablanca, MA
71.75.182.20	AS11426 Charter Communications Inc	6.21ms from Charlotte, US
46.105.3.164	AS16276 OVH SAS	0.35ms from Gravelines, FR
178.141.152.212	AS8359 MTS PJSC	16.25ms from Moscow, RU
54.193.101.180	AS16509 Amazon.com, Inc.	0.14ms from San Jose, US
203.151.169.100	AS4618 Internet Thailand Company Limited	0.57ms from Bangkok, TH
91.57.46.164	AS3320 Deutsche Telekom AG	4.68ms from Duesseldorf, DE
86.159.208.100	AS2856 British Telecommunications PLC	6.74ms from London, GB
20.100.219.164	AS8075 Microsoft Corporation	1.85ms from Oslo, NO
101.89.166.132	AS4812 China Telecom (Group)	3.20ms from Shanghai, CN

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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