203.91.122.0/23

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	203.91.120.0/22
Registry	APNIC
ID	DRAGONLAB-CERNET

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
68.35.99.87	AS7922 Comcast Cable Communications, LLC	13.62ms from Atlanta, US
84.188.128.199	AS3320 Deutsche Telekom AG	3.77ms from Frankfurt am Main, DE
89.79.235.151	AS9141 P4 Sp. z o.o.	7.26ms from Gdynia, PL
182.68.156.183	AS24560 Bharti Airtel Ltd., Telemedia Services	1.99ms from Kolkata, IN
94.86.255.199	AS3269 Telecom Italia S.p.A.	5.31ms from Milan, IT
119.6.226.103	AS4837 CHINA UNICOM China169 Backbone	1.76ms from Chengdu, CN
65.30.174.215	AS10796 Charter Communications Inc	5.03ms from Chicago, US
179.156.174.55	AS28573 Claro NXT Telecomunicacoes Ltda	4.21ms from Fortaleza, BR
104.17.20.183	AS13335 Cloudflare, Inc.	0.11ms from Porto Alegre, BR
78.31.216.119	AS12389 PJSC Rostelecom	5.82ms from Krasnodar, RU
106.41.109.103	AS4134 CHINANET-BACKBONE	13.79ms from Liaoyang, CN
49.147.48.215	AS9299 Philippine Long Distance Telephone Company	3.77ms from Manila, PH
54.175.161.199	AS14618 Amazon.com, Inc.	0.22ms from Reston, US
75.194.213.167	AS6167 Verizon Business	11.23ms from Washington, US
107.9.31.7	AS10796 Charter Communications Inc	8.08ms from Columbus, US
220.153.99.7	AS18081 Kintetsu Cable Network Co., Ltd.	1.83ms from Osaka, JP
203.112.58.151	AS7522 STNet, Incorporated	8.43ms from Osaka, JP
103.59.156.71	AS45971 Financial Security Institute	2.23ms from Seoul, KR
115.62.182.215	AS4837 CHINA UNICOM China169 Backbone	7.54ms from Zhengzhou, CN
5.56.92.231	AS8926 Moldtelecom SA	2.65ms from Chisinau, MD
34.61.143.231	AS396982 Google LLC	0.13ms from Council Bluffs, US
87.155.15.167	AS3320 Deutsche Telekom AG	3.63ms from Duesseldorf, DE
93.170.147.39	AS51121 Foboss-Telecom LLC	7.20ms from Kyiv, UA
91.170.203.135	AS12322 Free SAS	9.17ms from Paris, FR
27.219.166.167	AS4837 CHINA UNICOM China169 Backbone	1.64ms from Qingdao, CN

WHOIS Details

inetnum:        203.91.120.0 - 203.91.127.255
netname:        DRAGONLAB-CERNET
descr:          Network Technology Experiment Validation and Demonstration Center
descr:          FIT Center, Tsinghua University
descr:          Beijing 100084, China
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        confederation member
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:  2020-09-03T09:16:06Z
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 203.91.122.0/23

Range	ASN	Company	Num of IPs
203.91.120.0/22	AS4538	Network Technology Experiment Validation and Demonstration Center	1,024
203.91.120.0/21	AS4538	Network Technology Experiment Validation and Demonstration Center	2,048

Nearby Ranges

BGP prefixes that overlap with 203.91.0.0/16

Range	ASN	Company	Num of IPs
203.91.128.0/19	AS9237	HKT Global Operation (HK) Limited	8,192
203.91.32.0/19	AS23842	Shenzhen Information and Network Center	8,192
203.91.160.0/19	AS17529	STARCAT Co., Ltd.	8,192
203.91.112.0/21	AS24559	G-Mobile, Baga-Toiruu 3/9, Chingeltei district-1,	2,048
203.91.120.0/21	AS4538	Network Technology Experiment Validation and Demonstration Center	2,048
203.91.72.0/21	AS22769	LANLIAN INTERNATIONAL HOLDING GROUP LIMITED	2,048
203.91.64.0/21	AS63850	QRHUB PTY LTD T/A Entrust ICT	2,048
203.91.120.0/22	AS4538	Network Technology Experiment Validation and Demonstration Center	1,024
203.91.204.0/22	AS23664	Wipro Technologies	1,024
203.91.208.0/22	AS23664	Wipro Technologies	1,024
203.91.120.0/23	AS24575	Network Technology Experiment Validation and Demonstration Center	512
203.91.214.0/24	AS23664	Wipro Technologies	256
203.91.212.0/24	AS23664	Wipro Technologies	256
203.91.202.0/24	AS23664	Wipro Technologies	256
203.91.199.0/24	AS23664	Wipro Technologies	256
203.91.208.0/24	AS23664	Wipro Technologies	256
203.91.213.0/24	AS23664	Wipro Technologies	256
203.91.198.0/24	AS23664	Wipro Technologies	256
203.91.218.0/24	AS23664	Wipro Technologies	256
203.91.210.0/24	AS23664	Wipro Technologies	256
203.91.215.0/24	AS23664	Wipro Technologies	256
203.91.193.0/24	AS23664	Wipro Technologies	256
203.91.197.0/24	AS23664	Wipro Technologies	256
203.91.194.0/24	AS23664	Wipro Technologies	256
203.91.203.0/24	AS23664	Wipro Technologies	256
203.91.211.0/24	AS23664	Wipro Technologies	256
203.91.201.0/24	AS23664	Wipro Technologies	256
203.91.195.0/24	AS23664	Wipro Technologies	256
203.91.216.0/24	AS23664	Wipro Technologies	256
203.91.196.0/24	AS23664	Wipro Technologies	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.

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