121.250.24.0/21

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Parent Range 121.250.0.0/15
Registry APNIC
ID NJR-CERNET

WHOIS Details

inetnum:        121.248.0.0 - 121.251.255.255
netname:        NJR-CERNET
descr:          China Education and Research Network
descr:          Nanjing Regional Network
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        origin AS4538
remarks:        confederation
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:15:58Z
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:          121.248.0.0/15
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.250.24.0/21

Range ASN Company Num of IPs
121.250.0.0/15 AS4538 China Education and Research Network 131,072
121.248.0.0/14 AS4538 China Education and Research Network 262,144

Nearby Ranges

BGP prefixes that overlap with 121.250.0.0/16

Range ASN Company Num of IPs
121.248.0.0/14 AS4538 China Education and Research Network 262,144
121.250.0.0/15 AS4538 China Education and Research Network 131,072
121.250.96.0/19 AS24363 China Education and Research Network 8,192
121.250.96.0/19 AS4538 China Education and Research Network 8,192
121.250.160.0/19 AS24363 China Education and Research Network 8,192
121.250.160.0/19 AS4538 China Education and Research Network 8,192
121.250.208.0/20 AS24363 China Education and Research Network 4,096
121.250.208.0/20 AS4538 China Education and Research Network 4,096
121.250.240.0/20 AS4538 China Education and Research Network 4,096
121.250.240.0/20 AS24363 China Education and Research Network 4,096
121.250.0.0/20 AS24363 China Education and Research Network 4,096
121.250.192.0/20 AS4538 China Education and Research Network 4,096
121.250.0.0/20 AS4538 China Education and Research Network 4,096
121.250.128.0/20 AS24363 China Education and Research Network 4,096
121.250.192.0/20 AS24363 China Education and Research Network 4,096
121.250.128.0/20 AS4538 China Education and Research Network 4,096
121.250.144.0/20 AS4538 China Education and Research Network 4,096
121.250.144.0/20 AS24363 China Education and Research Network 4,096
121.250.32.0/20 AS24363 China Education and Research Network 4,096
121.250.32.0/20 AS4538 China Education and Research Network 4,096
121.250.224.0/21 AS24363 China Education and Research Network 2,048
121.250.80.0/21 AS4538 China Education and Research Network 2,048
121.250.80.0/21 AS24363 China Education and Research Network 2,048
121.250.16.0/21 AS24363 China Education and Research Network 2,048
121.250.16.0/21 AS4538 China Education and Research Network 2,048
121.250.224.0/21 AS4538 China Education and Research Network 2,048
121.250.56.0/21 AS24363 China Education and Research Network 2,048
121.250.56.0/21 AS4538 China Education and Research Network 2,048
121.250.88.0/23 AS24363 China Education and Research Network 512
121.250.88.0/23 AS4538 China Education and Research Network 512
121.250.48.0/23 AS24363 China Education and Research Network 512
121.250.48.0/23 AS4538 China Education and Research Network 512
121.250.50.0/24 AS4538 China Education and Research Network 256
121.250.50.0/24 AS24363 China Education and Research Network 256

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
121.250.28.130 3dalibaba.com 1

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

Pingable IPs

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

IP Address ASN Details
121.250.27.129 AS4538 China Education and Research Network Center 10.96ms from Beijing, CN
121.250.30.1 AS4538 China Education and Research Network Center 11.89ms from Beijing, CN
121.250.24.1 AS4538 China Education and Research Network Center 15.06ms from Beijing, CN
121.250.28.126 AS4538 China Education and Research Network Center 12.99ms from Beijing, 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
87.208.132.229 AS50266 Odido Netherlands B.V. 4.56ms from Amsterdam, NL
44.232.44.181 AS16509 Amazon.com, Inc. 0.17ms from Boardman, US
52.34.116.149 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
72.166.96.197 AS209 CenturyLink Communications, LLC 5.78ms from Chicago, US
88.224.149.85 AS9121 Turk Telekomunikasyon Anonim Sirketi 10.35ms from Izmir, TR
195.23.112.181 AS1897 NOS COMUNICACOES, S.A. 11.49ms from Lisbon, PT
183.101.53.69 AS4766 Korea Telecom 1.59ms from Seoul, KR
47.94.53.197 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 2.06ms from Beijing, CN
139.59.92.101 AS14061 DigitalOcean, LLC 0.31ms from Bengaluru, IN
63.41.123.229 AS6167 Verizon Business 19.10ms from Dallas, US
216.239.162.69 AS23314 Summit Broadband 4.72ms from Miami, US
78.157.5.21 AS16333 Company for communications services A1 Makedonija DOOEL Skopje 5.43ms from Pristina, XK
151.63.214.133 AS1267 WIND TRE S.P.A. 19.71ms from Rende, IT
5.133.238.5 AS196925 AZERTELECOM LLC 2.21ms from Baku, AZ
101.109.238.133 AS23969 TOT Public Company Limited 1.31ms from Bangkok, TH
51.142.113.245 AS8075 Microsoft Corporation 0.19ms from London, GB
192.189.45.5 AS2152 CENIC 2.08ms from Los Angeles, US
113.158.90.165 AS2516 KDDI CORPORATION 8.96ms from Osaka, JP
70.171.201.69 AS22773 Cox Communications Inc. 4.72ms from Phoenix, US
1.230.206.69 AS9318 SK Broadband Co Ltd 1.01ms from Seoul, KR
153.171.10.37 AS4713 NTT Communications Corporation 7.65ms from Tokyo, JP
102.214.88.37 AS329169 Maxinet Broadband 0.56ms from Accra, GH
186.123.117.245 AS11664 Techtel LMDS Comunicaciones Interactivas S.A. 18.87ms from Buenos Aires, AR
71.239.186.245 AS7922 Comcast Cable Communications, LLC 4.68ms from Chicago, US
72.20.129.5 AS394437 PS Lightwave 0.80ms from Houston, US

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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