121.194.80.0/21

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Parent Range 121.194.0.0/15
Registry APNIC
ID BJR-CERNET

WHOIS Details

inetnum:        121.194.0.0 - 121.195.255.255
netname:        BJR-CERNET
descr:          China Education and Research Network
descr:          Beijing 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:          121.195.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.194.80.0/21

Range ASN Company Num of IPs
121.194.0.0/15 AS4538 China Education and Research Network 131,072
121.192.0.0/14 AS4538 China Education and Research Network 262,144

Nearby Ranges

BGP prefixes that overlap with 121.194.0.0/16

Range ASN Company Num of IPs
121.192.0.0/14 AS4538 China Education and Research Network 262,144
121.194.0.0/15 AS4538 China Education and Research Network 131,072
121.194.224.0/19 AS4538 China Education and Research Network 8,192
121.194.192.0/19 AS4538 China Education and Research Network 8,192
121.194.0.0/20 AS4538 China Education and Research Network 4,096
121.194.16.0/20 AS4538 China Education and Research Network 4,096
121.194.64.0/20 AS4538 China Education and Research Network 4,096
121.194.96.0/20 AS4538 China Education and Research Network 4,096
121.194.32.0/20 AS4538 China Education and Research Network 4,096
121.194.112.0/20 AS4538 China Education and Research Network 4,096
121.194.176.0/20 AS4538 China Education and Research Network 4,096
121.194.144.0/20 AS4538 China Education and Research Network 4,096
121.194.48.0/20 AS4538 China Education and Research Network 4,096
121.194.92.0/22 AS4538 China Education and Research Network 1,024
121.194.88.0/22 AS4538 China Education and Research Network 1,024
121.194.172.0/22 AS4538 China Education and Research Network 1,024
121.194.174.0/23 AS4538 China Education and Research Network 512
121.194.172.0/23 AS4538 China Education and Research Network 512
121.194.167.0/24 AS4538 China Education and Research Network 256
121.194.4.0/24 AS4538 China Education and Research Network 256
121.194.4.0/24 AS133111 China Education and Research Network 256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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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
200.7.100.69 AS33182 HostDime.com, Inc. 1.28ms from Bogota, CO
71.233.21.21 AS7922 Comcast Cable Communications, LLC 5.45ms from Boston, US
97.89.214.181 AS20115 Charter Communications LLC 15.86ms from Dallas, US
54.246.180.21 AS16509 Amazon.com, Inc. 0.16ms from Dublin, IE
86.45.70.5 AS5466 Eircom Limited 4.88ms from Dublin, IE
58.252.132.229 AS17816 China Unicom IP network China169 Guangdong province 9.32ms from Guangzhou, CN
106.53.153.149 AS45090 Shenzhen Tencent Computer Systems Company Limited 2.15ms from Guangzhou, CN
91.193.127.5 AS42798 Sergey Vyacheslavovich Gliga 7.45ms from Kyiv, UA
12.86.97.101 AS7018 AT&T Enterprises, LLC 1.46ms from Los Angeles, US
13.120.76.37 AS36351 IBM Cloud 0.49ms from Madrid, ES
91.204.201.165 AS47564 Proizvodstvennoe Obyedineniye Tonus Ltd. 2.93ms from Moscow, RU
119.66.248.53 AS17858 LG POWERCOMM 8.65ms from Seoul, KR
121.170.208.117 AS4766 Korea Telecom 1.30ms from Seoul, KR
125.133.192.181 AS4766 Korea Telecom 1.30ms from Seoul, KR
121.130.214.21 AS4766 Korea Telecom 1.32ms from Seoul, KR
13.112.14.197 AS16509 Amazon.com, Inc. 0.17ms from Tokyo, JP
126.171.163.21 AS17676 SoftBank Corp. 8.17ms from Tokyo, JP
118.1.80.117 AS4713 NTT Communications Corporation 7.53ms from Tokyo, JP
188.47.198.133 AS21395 Orange Polska Spolka Akcyjna 3.32ms from Warsaw, PL
185.233.88.245 AS39647 Enreach Netherlands B.V. 1.40ms from Amsterdam, NL
217.136.229.229 AS5432 Proximus NV 5.60ms from Amsterdam, NL
20.21.144.181 AS8075 Microsoft Corporation 0.59ms from Az Za`ayin, QA
119.57.169.101 AS55461 Beijing Sun Rise Technology CO.,LTD 1.37ms from Beijing, CN
188.150.236.197 AS1257 Tele2 Sverige AB 2.31ms from Copenhagen, DK
212.211.155.53 AS12399 q.beyond AG 0.30ms from Frankfurt am Main, DE

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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