121.194.0.0/20

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	121.194.0.0/15
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 121.194.0.0/20

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

BGP prefixes that are contained by 121.194.0.0/20

Range	ASN	Company	Num of IPs
121.194.4.0/24	AS133111	China Education and Research Network	256
121.194.4.0/24	AS4538	China Education and Research Network	256

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
121.194.16.0/20	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
121.194.80.0/21	AS4538	China Education and Research Network	2,048
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 140 domain names hosted across 61 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
121.194.4.35	hcxwgy.com	11
121.194.14.158	seu.edu.cn	7
121.194.14.142	xiaolin.tech	2
121.194.4.144	libedit.cn	1
121.194.4.59	cjcmm.com.cn	1
121.194.4.58	cjprs.org.cn	1
121.194.9.71	ykt.io	1
121.194.3.159	chisa.edu.cn	1
121.194.4.29	jsjjy.com	1
121.194.4.151	cnki.com.cn	1
121.194.1.9	sunhopego.com	1
121.194.4.25	liaoningyixue.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

Read more

Pingable IPs

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

IP Address	ASN	Details
121.194.2.137	AS4538 China Education and Research Network Center	3.12ms from Beijing, CN
121.194.5.13	AS4538 China Education and Research Network Center	2.95ms from Beijing, CN
121.194.11.28	AS4538 China Education and Research Network Center	2.55ms from Beijing, CN
121.194.4.55	AS4538 China Education and Research Network Center	3.13ms from Beijing, CN
121.194.7.22	AS4538 China Education and Research Network Center	3.01ms from Beijing, CN
121.194.8.70	AS4538 China Education and Research Network Center	2.56ms from Beijing, CN
121.194.14.103	AS4538 China Education and Research Network Center	3.83ms from Shanghai, CN
121.194.15.87	AS4538 China Education and Research Network Center	3.48ms from Beijing, CN
121.194.1.26	AS4538 China Education and Research Network Center	2.56ms from Beijing, CN
121.194.13.99	AS4538 China Education and Research Network Center	3.72ms from Beijing, CN
121.194.9.20	AS4538 China Education and Research Network Center	2.81ms from Beijing, CN
121.194.3.180	AS4538 China Education and Research Network Center	3.72ms from Beijing, CN
121.194.0.77	AS4538 China Education and Research Network Center	2.68ms from Beijing, CN
121.194.10.77	AS4538 China Education and Research Network Center	2.63ms from Tianjin, 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
99.43.174.164	AS7018 AT&T Enterprises, LLC	13.80ms from Atlanta, US
67.165.157.36	AS7922 Comcast Cable Communications, LLC	6.23ms from Chicago, US
98.50.246.196	AS7922 Comcast Cable Communications, LLC	11.19ms from Dallas, US
91.179.37.68	AS5432 Proximus NV	4.71ms from Gravelines, FR
125.92.179.4	AS4134 CHINANET-BACKBONE	4.36ms from Guangzhou, CN
47.98.99.116	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	2.08ms from Hangzhou, CN
88.22.235.180	AS3352 TELEFONICA DE ESPANA S.A.U.	11.30ms from Madrid, ES
84.51.111.244	AS29124 Iskratelecom JSC	0.93ms from Moscow, RU
49.86.185.100	AS4134 CHINANET-BACKBONE	16.06ms from Nanjing, CN
36.33.252.164	AS4837 CHINA UNICOM China169 Backbone	10.48ms from Nanjing, CN
54.175.33.228	AS14618 Amazon.com, Inc.	0.23ms from Reston, US
98.36.41.180	AS7922 Comcast Cable Communications, LLC	7.07ms from San Jose, US
199.87.76.68	AS13607 Intuitive Surgical Operations, Inc.	0.63ms from Santa Clara, US
43.212.12.148	AS16509 Amazon.com, Inc.	0.18ms from Taipei, TW
209.235.187.164	AS20448 Peace Communications LLC	2.82ms from Atlanta, US
151.80.57.52	AS16276 OVH SAS	2.94ms from Frankfurt am Main, DE
183.179.100.68	AS9269 Hong Kong Broadband Network Ltd.	1.36ms from Hong Kong, HK
139.179.12.100	AS8466 Ihsan Dogramaci Bilkent University	11.13ms from Istanbul, TR
90.167.12.116	AS12479 Orange Espagne SA	11.25ms from Madrid, ES
104.71.131.84	AS20940 Akamai International B.V.	0.10ms from Melbourne, AU
60.109.42.4	AS17676 SoftBank Corp.	3.38ms from Osaka, JP
189.107.160.4	AS7738 V tal	11.09ms from Sao Paulo, BR
67.160.69.244	AS7922 Comcast Cable Communications, LLC	4.76ms from Seattle, US
59.6.110.20	AS4766 Korea Telecom	1.06ms from Seoul, KR
116.127.144.148	AS9318 SK Broadband Co Ltd	1.47ms from Seoul, KR

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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