121.49.16.0/20

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Parent Range 121.48.0.0/15
Registry APNIC
ID CDR-CERNET

WHOIS Details

inetnum:        121.48.0.0 - 121.49.255.255
netname:        CDR-CERNET
descr:          China Education and Research Network
descr:          Chengdu 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:  2020-09-03T09:16:00Z
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:          121.49.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.49.16.0/20

Range ASN Company Num of IPs
121.48.0.0/15 AS4538 China Education and Research Network 131,072

Nearby Ranges

BGP prefixes that overlap with 121.49.0.0/16

Range ASN Company Num of IPs
121.48.0.0/15 AS4538 China Education and Research Network 131,072
121.49.64.0/18 AS4538 China Education and Research Network 16,384
121.49.160.0/19 AS4538 China Education and Research Network 8,192
121.49.32.0/21 AS4538 China Education and Research Network 2,048
121.49.200.0/21 AS4538 China Education and Research Network 2,048
121.49.0.0/22 AS4538 China Education and Research Network 1,024
121.49.5.0/24 AS4538 China Education and Research Network 256
121.49.198.0/24 AS4538 China Education and Research Network 256
121.49.152.0/24 AS4538 China Education and Research Network 256
121.49.197.0/24 AS4538 China Education and Research Network 256
121.49.0.0/24 AS4538 China Education and Research Network 256
121.49.4.0/24 AS4538 China Education and Research Network 256
121.49.199.0/24 AS4538 China Education and Research Network 256
121.49.128.0/24 AS4538 China Education and Research Network 256
121.49.195.0/24 AS4538 China Education and Research Network 256
121.49.193.0/24 AS4538 China Education and Research Network 256
121.49.153.0/24 AS4538 China Education and Research Network 256
121.49.192.0/24 AS4538 China Education and Research Network 256
121.49.196.0/24 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

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
105.101.162.228 AS36947 Telecom Algeria 11.82ms from Algiers, DZ
178.224.171.228 AS50266 Odido Netherlands B.V. 2.68ms from Amsterdam, NL
23.48.104.196 AS20940 Akamai International B.V. 0.17ms from Ashburn, US
114.245.154.148 AS4808 China Unicom Beijing Province Network 3.70ms from Beijing, CN
60.26.240.180 AS4837 CHINA UNICOM China169 Backbone 5.47ms from Beijing, CN
134.102.105.20 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 6.82ms from Berlin, DE
54.172.221.84 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
148.204.239.20 AS3484 Instituto Politecnico Nacional 4.09ms from Santiago de Queretaro, MX
182.31.92.36 AS9694 Seokyung Cable Television Co.. Ltd. 8.73ms from Seoul, KR
91.202.14.4 AS44493 Chelyabinsk-Signal LLC 0.49ms from Chelyabinsk, RU
98.206.42.180 AS7922 Comcast Cable Communications, LLC 4.90ms from Chicago, US
96.28.42.20 AS10796 Charter Communications Inc 13.66ms from Columbus, US
209.143.34.20 AS7106 Com Net, Inc. 4.09ms from Detroit, US
84.57.182.228 AS3209 Vodafone GmbH 18.69ms from Frankfurt am Main, DE
31.150.95.100 AS9145 EWE TEL GmbH 3.62ms from Hamburg, DE
67.48.153.148 AS11427 Charter Communications Inc 12.92ms from Houston, US
5.253.202.116 AS3257 GTT Communications Inc. 0.27ms from London, GB
188.84.65.244 AS12430 VODAFONE ESPANA S.A.U. 14.20ms from Madrid, ES
81.37.192.36 AS3352 TELEFONICA DE ESPANA S.A.U. 11.28ms from Madrid, ES
151.84.15.36 AS1267 WIND TRE S.P.A. 3.98ms from Milan, IT
24.179.251.132 AS20115 Charter Communications LLC 9.68ms from Minneapolis, US
218.236.34.228 AS9318 SK Broadband Co Ltd 7.08ms from Seoul, KR
114.33.51.148 AS3462 Data Communication Business Group 3.98ms from Taichung, TW
194.69.221.52 AS62225 Viken Fiber AS 4.22ms from Oslo, NO
128.120.80.68 AS6192 University of California, Davis 3.37ms from San Jose, 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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