202.120.181.0/24

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	202.120.176.0/20
Registry	APNIC
ID	CERNET-CN

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
199.116.117.200	AS46562 Performive LLC	0.57ms from Atlanta, US
23.210.194.120	AS7552 Viettel Group	0.21ms from Hanoi, VN
91.159.122.200	AS719 Elisa Oyj	0.88ms from Helsinki, FI
123.135.208.136	AS4837 CHINA UNICOM China169 Backbone	5.12ms from Qingdao, CN
68.120.12.232	AS7018 AT&T Enterprises, LLC	4.18ms from Redding, US
18.173.237.24	AS16509 Amazon.com, Inc.	0.16ms from Secaucus, US
32.219.253.248	AS46690 Southern New England Telephone Company and SNET America, Inc.	3.99ms from Secaucus, US
123.10.177.72	AS4837 CHINA UNICOM China169 Backbone	7.73ms from Zhengzhou, CN
156.205.69.72	AS8452 TE-AS	3.49ms from Cairo, EG
123.26.104.184	AS45899 VNPT Corp	1.16ms from Da Nang, VN
77.0.10.120	AS6805 Telefonica Germany GmbH & Co.OHG	2.37ms from Hamburg, DE
118.31.59.104	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	3.62ms from Hangzhou, CN
46.159.219.88	AS12389 PJSC Rostelecom	2.21ms from Krasnodar, RU
31.181.205.120	AS12389 PJSC Rostelecom	2.96ms from Krasnodar, RU
124.219.238.216	AS2527 Sony Network Communications Inc.	2.95ms from Tokyo, JP
99.42.200.216	AS7018 AT&T Enterprises, LLC	8.21ms from Chicago, US
125.59.194.24	AS9908 HK Cable TV Ltd	1.54ms from Hong Kong, HK
42.58.94.88	AS4837 CHINA UNICOM China169 Backbone	8.66ms from Liaoyang, CN
195.11.157.104	AS1273 Vodafone Group PLC	0.94ms from London, GB
78.147.84.168	AS13285 TalkTalk Communications Limited	2.78ms from London, GB
79.155.78.200	AS3352 TELEFONICA DE ESPANA S.A.U.	9.07ms from Madrid, ES
103.88.69.232	AS132505 Concentrix Daksh Services Philippines Corporation	1.10ms from Manila, PH
182.158.157.120	AS4725 SoftBank Corp.	17.50ms from Tokyo, JP
31.56.57.8	AS60781 LeaseWeb Netherlands B.V.	0.24ms from Amsterdam, NL
87.158.22.200	AS3320 Deutsche Telekom AG	5.52ms from Frankfurt am Main, DE

WHOIS Details

inetnum:        202.112.0.0 - 202.121.255.255
netname:        CERNET-CN
descr:          China Education and Research Network
descr:          China Education and Research Network Center
descr:          Tsinghua University
descr:          Beijing, 100084
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        origin AS4538
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:29Z
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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        [email protected] 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:         [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        [email protected] was validated on 2025-01-22
abuse-mailbox:  [email protected]
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:         [email protected]
remarks:        [email protected]
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

Overlapping Ranges

BGP prefixes that contain 202.120.181.0/24

Range	ASN	Company	Num of IPs
202.120.176.0/20	AS4538	China Education and Research Network	4,096
202.120.128.0/17	AS4538	China Education and Research Network	32,768
202.120.0.0/16	AS24364	China Education and Research Network	65,536
202.120.0.0/16	AS4538	China Education and Research Network	65,536
202.120.0.0/15	AS4538	China Education and Research Network	131,072

Nearby Ranges

BGP prefixes that overlap with 202.120.0.0/16

Range	ASN	Company	Num of IPs
202.120.0.0/15	AS4538	China Education and Research Network	131,072
202.120.0.0/16	AS4538	China Education and Research Network	65,536
202.120.0.0/16	AS24364	China Education and Research Network	65,536
202.120.0.0/17	AS4538	China Education and Research Network	32,768
202.120.128.0/17	AS4538	China Education and Research Network	32,768
202.120.0.0/18	AS24364	China Education and Research Network	16,384
202.120.0.0/18	AS4538	China Education and Research Network	16,384
202.120.224.0/19	AS4538	China Education and Research Network	8,192
202.120.224.0/19	AS24364	China Education and Research Network	8,192
202.120.112.0/20	AS4538	China Education and Research Network	4,096
202.120.208.0/20	AS4538	China Education and Research Network	4,096
202.120.208.0/20	AS24364	China Education and Research Network	4,096
202.120.160.0/20	AS4538	China Education and Research Network	4,096
202.120.128.0/20	AS4538	China Education and Research Network	4,096
202.120.64.0/20	AS4538	China Education and Research Network	4,096
202.120.176.0/20	AS4538	China Education and Research Network	4,096
202.120.192.0/21	AS4538	China Education and Research Network	2,048
202.120.200.0/22	AS4538	China Education and Research Network	1,024
202.120.247.0/24	AS4538	China Education and Research Network	256
202.120.43.0/24	AS4538	China Education and Research Network	256
202.120.40.0/24	AS4538	China Education and Research Network	256
202.120.108.0/24	AS4538	China Education and Research Network	256
202.120.125.0/24	AS4538	China Education and Research Network	256
202.120.188.0/24	AS4538	China Education and Research Network	256
202.120.118.0/24	AS4538	China Education and Research Network	256
202.120.126.0/24	AS4538	China Education and Research Network	256
202.120.235.0/24	AS4538	China Education and Research Network	256
202.120.209.0/24	AS4538	China Education and Research Network	256
202.120.19.0/24	AS4538	China Education and Research Network	256
202.120.146.0/24	AS4538	China Education and Research Network	256
202.120.2.0/24	AS4538	China Education and Research Network	256
202.120.234.0/24	AS4538	China Education and Research Network	256
202.120.58.0/24	AS4538	China Education and Research Network	256
202.120.215.0/24	AS4538	China Education and Research Network	256
202.120.224.0/24	AS4538	China Education and Research Network	256

Hosted domains

There are no domains currently hosted on this ASN.

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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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