121.193.0.0/16

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Registry APNIC
ID BJR-CERNET

WHOIS Details

inetnum:        121.193.0.0 - 121.193.255.255
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:  2020-09-03T09:16:09Z
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 2025-08-15
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-11-18T00:26:28Z
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 2025-08-15
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-15T09:38:28Z
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:          121.193.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 121.0.0.0/8

Range ASN Company Num of IPs
121.160.0.0/11 AS38427 Korea Telecom 2,097,152
121.128.0.0/11 AS38395 Korea Telecom 2,097,152
121.160.0.0/11 AS17859 Korea Telecom 2,097,152
121.160.0.0/11 AS38431 Korea Telecom 2,097,152
121.128.0.0/11 AS152214 Korea Telecom 2,097,152
121.128.0.0/11 AS38394 Korea Telecom 2,097,152
121.128.0.0/11 AS18333 Korea Telecom 2,097,152
121.128.0.0/11 AS38412 Korea Telecom 2,097,152
121.128.0.0/11 AS17588 Korea Telecom 2,097,152
121.160.0.0/11 AS38087 Korea Telecom 2,097,152
121.160.0.0/11 AS38089 Korea Telecom 2,097,152
121.160.0.0/11 AS23582 Korea Telecom 2,097,152
121.128.0.0/11 AS3786 Korea Telecom 2,097,152
121.160.0.0/11 AS55615 Korea Telecom 2,097,152
121.160.0.0/11 AS38404 Korea Telecom 2,097,152
121.128.0.0/11 AS38399 Korea Telecom 2,097,152
121.160.0.0/11 AS38392 Korea Telecom 2,097,152
121.160.0.0/11 AS17862 Korea Telecom 2,097,152
121.160.0.0/11 AS55622 Korea Telecom 2,097,152
121.128.0.0/11 AS18023 Korea Telecom 2,097,152
121.160.0.0/11 AS38415 Korea Telecom 2,097,152
121.160.0.0/11 AS38391 Korea Telecom 2,097,152
121.128.0.0/11 AS131792 Korea Telecom 2,097,152
121.160.0.0/11 AS3786 Korea Telecom 2,097,152
121.160.0.0/11 AS10167 Korea Telecom 2,097,152
121.128.0.0/11 AS9526 Korea Telecom 2,097,152
121.128.0.0/11 AS38126 Korea Telecom 2,097,152
121.160.0.0/11 AS9647 Korea Telecom 2,097,152
121.128.0.0/11 AS38122 Korea Telecom 2,097,152
121.128.0.0/11 AS9530 Korea Telecom 2,097,152
121.128.0.0/11 AS4766 Korea Telecom 2,097,152
121.128.0.0/11 AS46002 Korea Telecom 2,097,152
121.128.0.0/11 AS9870 Korea Telecom 2,097,152
121.128.0.0/11 AS9776 Korea Telecom 2,097,152
121.160.0.0/11 AS9778 Korea Telecom 2,097,152
121.160.0.0/11 AS38093 Korea Telecom 2,097,152
121.128.0.0/11 AS9856 Korea Telecom 2,097,152
121.160.0.0/11 AS4766 Korea Telecom 2,097,152
121.160.0.0/11 AS9708 Korea Telecom 2,097,152
121.128.0.0/11 AS9696 Korea Telecom 2,097,152
121.160.0.0/11 AS45399 Korea Telecom 2,097,152
121.128.0.0/11 AS9647 Korea Telecom 2,097,152
121.160.0.0/11 AS9530 Korea Telecom 2,097,152
121.160.0.0/11 AS9843 Korea Telecom 2,097,152
121.160.0.0/11 AS9684 Korea Telecom 2,097,152
121.128.0.0/11 AS38697 Korea Telecom 2,097,152
121.160.0.0/11 AS38696 Korea Telecom 2,097,152
121.128.0.0/11 AS9638 Korea Telecom 2,097,152
121.224.0.0/12 AS4134 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS146966 CHINANET jiangsu province network 1,048,576

Hosted domains

There are 5 domain names hosted across 6 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
121.193.213.11 burwelldivorcelawyer.com 1
121.193.132.24 gtsi.edu.cn 1
121.193.149.171 tjufe.edu.cn 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

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

IP Address ASN Details
121.193.173.254 AS4538 China Education and Research Network Center 6.26ms from Beijing, CN
121.193.160.253 AS4538 China Education and Research Network Center 4.54ms from Beijing, CN
121.193.185.193 AS4538 China Education and Research Network Center 6.79ms from Beijing, CN
121.193.174.111 AS4538 China Education and Research Network Center 6.13ms from Beijing, CN
121.193.222.201 AS4538 China Education and Research Network Center 15.24ms from Tianjin, CN
121.193.176.13 AS4538 China Education and Research Network Center 6.57ms from Beijing, CN
121.193.168.60 AS4538 China Education and Research Network Center 6.94ms from Beijing, CN
121.193.190.254 AS4538 China Education and Research Network Center 6.90ms from Beijing, CN
121.193.143.234 AS4538 China Education and Research Network Center 4.08ms from Beijing, CN
121.193.183.254 AS4538 China Education and Research Network Center 4.96ms from Beijing, CN
121.193.191.253 AS4538 China Education and Research Network Center 4.72ms from Beijing, CN
121.193.132.42 AS4538 China Education and Research Network Center 6.95ms from Beijing, CN
121.193.131.8 AS4538 China Education and Research Network Center 6.17ms from Beijing, CN
121.193.177.253 AS4538 China Education and Research Network Center 5.48ms from Beijing, CN
121.193.184.78 AS4538 China Education and Research Network Center 5.46ms from Beijing, CN
121.193.161.214 AS4538 China Education and Research Network Center 4.35ms from Beijing, CN
121.193.149.191 AS4538 China Education and Research Network Center 5.51ms from Beijing, CN
121.193.165.254 AS4538 China Education and Research Network Center 6.46ms from Beijing, CN
121.193.186.18 AS4538 China Education and Research Network Center 6.48ms from Beijing, CN
121.193.171.254 AS4538 China Education and Research Network Center 4.84ms from Tianjin, CN
121.193.130.40 AS4538 China Education and Research Network Center 5.21ms from Beijing, CN
121.193.151.84 AS4538 China Education and Research Network Center 4.49ms from Beijing, CN
121.193.178.53 AS4538 China Education and Research Network Center 6.54ms from Tianjin, CN
121.193.136.225 AS4538 China Education and Research Network Center 4.29ms from Beijing, CN
121.193.163.254 AS4538 China Education and Research Network Center 5.88ms 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
171.78.179.32 AS24560 Bharti Airtel Ltd., Telemedia Services 1.89ms from Hyderabad, IN
87.225.71.32 AS12389 PJSC Rostelecom 0.89ms from Khabarovsk, RU
82.88.245.0 AS3269 Telecom Italia S.p.A. 7.72ms from Milan, IT
85.30.242.208 AS42610 PJSC Rostelecom 3.12ms from Moscow, RU
71.169.14.96 AS701 Verizon Business 3.09ms from New York City, US
124.131.45.80 AS4837 CHINA UNICOM China169 Backbone 5.33ms from Qingdao, CN
97.146.13.64 AS6167 Verizon Business 15.12ms from Reston, US
14.85.0.16 AS4766 Korea Telecom 2.99ms from Seoul, KR
59.8.6.32 AS4766 Korea Telecom 9.98ms from Seoul, KR
197.26.62.240 AS37671 3S INF 8.15ms from Tunis, TN
47.92.168.128 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.17ms from Zhangjiakou, CN
172.206.39.48 AS8075 Microsoft Corporation 0.36ms from Boydton, US
190.153.52.240 AS11562 Net Uno, C.A. 1.30ms from Caracas, VE
218.8.211.208 AS4837 CHINA UNICOM China169 Backbone 14.57ms from Changchun, CN
76.227.25.112 AS7018 AT&T Enterprises, LLC 18.08ms from Dallas, US
157.240.0.48 AS32934 Facebook, Inc. 0.16ms from Frankfurt am Main, DE
109.134.247.0 AS5432 Proximus NV 3.82ms from Gravelines, FR
47.111.31.16 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 4.36ms from Hangzhou, CN
27.111.47.240 AS24532 PT. Inet Global Indo 0.39ms from Jakarta, ID
183.207.215.80 AS56046 China Mobile communications corporation 1.69ms from Nanjing, CN
88.124.39.144 AS12322 Free SAS 9.15ms from Paris, FR
176.140.25.144 AS5410 Bouygues Telecom SA 13.56ms from Paris, FR
112.240.135.208 AS4837 CHINA UNICOM China169 Backbone 9.33ms from Qingdao, CN
98.80.84.48 AS14618 Amazon.com, Inc. 0.18ms from Reston, US
31.176.209.64 AS9146 BIHNET Autonomus System 5.45ms from Sarajevo, BA

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 -f3 -m12 121.193.50.204
traceroute to 121.193.50.204 (121.193.50.204): 12 hops max, 52 byte packets
4 *
5 *
6 *
7 *
8 [] 123.255.91.118 210.874 ms
9 [AS4538] 101.4.114.181 293.286 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Iasi, RO
On

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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