121.49.200.0/21

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Parent Range 121.48.0.0/15
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 121.49.200.0/21

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
121.49.16.0/20 AS4538 China Education and Research Network 4,096
121.49.32.0/21 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

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

IP Address ASN Details
121.49.200.2 AS4538 China Education and Research Network Center 28.36ms from Guangzhou, CN
121.49.201.209 AS4538 China Education and Research Network Center 28.59ms from Guiyang, 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
87.159.185.245 AS3320 Deutsche Telekom AG 1.80ms from Berlin, DE
14.141.132.229 AS4755 TATA Communications formerly VSNL is Leading ISP 0.40ms from Kolkata, IN
185.193.8.165 AS56882 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL 1.77ms from Madrid, ES
189.172.193.197 AS8151 UNINET 16.55ms from Miami, US
58.121.106.101 AS9318 SK Broadband Co Ltd 2.77ms from Seoul, KR
13.230.111.117 AS16509 Amazon.com, Inc. 0.15ms from Tokyo, JP
64.119.97.181 AS812 Rogers Communications Canada Inc. 1.67ms from Toronto, CA
24.73.149.165 AS33363 Charter Communications, Inc 6.08ms from Orlando, US
1.212.135.213 AS3786 LG DACOM Corporation 1.42ms from Seoul, KR
183.50.32.101 AS140308 CHINATELECOM Guangdong province Zhuhai 5G network 8.35ms from Shenzhen, CN
27.93.140.101 AS2516 KDDI CORPORATION 0.89ms from Tokyo, JP
168.245.105.133 AS11377 SendGrid, Inc. 0.38ms from Ashburn, US
157.238.137.69 AS19693 Centrilogic, Inc. 2.72ms from Buffalo, US
52.18.159.37 AS16509 Amazon.com, Inc. 0.16ms from Dublin, IE
176.51.247.37 AS12389 PJSC Rostelecom 1.11ms from Novosibirsk, RU
189.168.241.53 AS8151 UNINET 11.15ms from Santiago de Queretaro, MX
106.54.163.53 AS45090 Shenzhen Tencent Computer Systems Company Limited 0.63ms from Shanghai, CN
58.5.75.213 AS17506 ARTERIA Networks Corporation 0.82ms from Tokyo, JP
175.147.191.133 AS4837 CHINA UNICOM China169 Backbone 10.38ms from Liaoyang, CN
151.58.136.101 AS1267 WIND TRE S.P.A. 12.72ms from Milan, IT
200.38.242.101 AS6503 Axtel, S.A.B. de C.V. 1.62ms from Monterrey, MX
91.164.43.53 AS12322 Free SAS 8.73ms from Paris, FR
89.2.165.85 AS15557 Societe Francaise Du Radiotelephone - SFR SA 8.59ms from Paris, FR
177.83.34.197 AS28573 Claro NXT Telecomunicacoes Ltda 13.30ms from Porto Alegre, BR
27.219.150.5 AS4837 CHINA UNICOM China169 Backbone 1.21ms from Qingdao, 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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