202.127.232.0/21

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	202.127.224.0/19
Registry	APNIC
ID	BJR-CERNET

WHOIS Details

inetnum:        202.127.224.0 - 202.127.239.255
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:        old HIT-CN returned on 19951110
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:28Z
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

Overlapping Ranges

BGP prefixes that contain 202.127.232.0/21

Range	ASN	Company	Num of IPs
202.127.224.0/19	AS4538	China Education and Research Network	8,192

BGP prefixes that are contained by 202.127.232.0/21

Range	ASN	Company	Num of IPs
202.127.239.0/24	AS4538	China Education and Research Network	256
202.127.232.0/24	AS4538	China Education and Research Network	256
202.127.237.0/24	AS4538	China Education and Research Network	256
202.127.236.0/24	AS4538	China Education and Research Network	256
202.127.233.0/24	AS4538	China Education and Research Network	256

Nearby Ranges

BGP prefixes that overlap with 202.127.0.0/16

Range	ASN	Company	Num of IPs
202.127.224.0/19	AS4538	China Education and Research Network	8,192
202.127.80.0/20	AS24255	Tannan Cable Television Corporation	4,096
202.127.16.0/20	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	4,096
202.127.144.0/20	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	4,096
202.127.240.0/20	AS4538	China Education and Research Network	4,096
202.127.176.0/20	AS24259	kanuma cable television Corporation	4,096
202.127.96.0/20	AS17910	PT. Tigatra Infokom	4,096
202.127.32.0/21	AS46030	PT Wahan Inovasi Nusantara	2,048
202.127.200.0/21	AS7497	The Hefei Branch of Chinese Academy of Sciences	2,048
202.127.216.0/21	AS4538	China Education and Research Network	2,048
202.127.40.0/21	AS4808	Information Center, Ministry of Agriculture and Rural Affairs, PRC	2,048
202.127.168.0/21	AS24396	Bank Of China(Hong Kong) Limited	2,048
202.127.0.0/21	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	2,048
202.127.36.0/22	AS46030	PT Wahan Inovasi Nusantara	1,024
202.127.12.0/22	AS9929	Nanjing Institute of Science and Technology Information	1,024
202.127.32.0/22	AS46030	PT Wahan Inovasi Nusantara	1,024
202.127.36.0/23	AS46030	PT Wahan Inovasi Nusantara	512
202.127.48.0/23	AS4808	National Information Center of GACC (National E-Clearance Center of GACC)	512
202.127.34.0/23	AS46030	PT Wahan Inovasi Nusantara	512
202.127.70.0/23	AS4637	Telstra Global Internet Services Network Blocks	512
202.127.30.0/23	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	512
202.127.32.0/23	AS46030	PT Wahan Inovasi Nusantara	512
202.127.38.0/23	AS46030	PT Comradindo Lintasnusa Perkasa	512
202.127.16.0/23	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	512
202.127.144.0/23	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	512
202.127.173.0/24	AS24396	Bank Of China(Hong Kong) Limited	256
202.127.239.0/24	AS4538	China Education and Research Network	256
202.127.10.0/24	AS140220	Sky Broadband	256
202.127.104.0/24	AS17910	Aperto Permata - Niaga Tower	256
202.127.232.0/24	AS4538	China Education and Research Network	256
202.127.99.0/24	AS17910	3GNet Network Operation Center	256
202.127.237.0/24	AS4538	China Education and Research Network	256
202.127.169.0/24	AS24396	Bank Of China(Hong Kong) Limited	256
202.127.96.0/24	AS17910	3Gate Router and Servers	256
202.127.74.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.97.0/24	AS17910	3Gate Co-Lococation	256
202.127.79.0/24	AS4637	Telstra Global Internet Services Network Blocks	256
202.127.106.0/24	AS17910	Infrastructure for Serial Customer	256
202.127.153.0/24	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	256
202.127.0.0/24	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	256
202.127.170.0/24	AS24396	Bank Of China(Hong Kong) Limited	256
202.127.100.0/24	AS17910	Allocation for 3GNet Platinum Customer	256
202.127.236.0/24	AS4538	China Education and Research Network	256
202.127.171.0/24	AS24396	Bank Of China(Hong Kong) Limited	256
202.127.233.0/24	AS4538	China Education and Research Network	256
202.127.73.0/24	AS4637	Telstra Global Internet Services Network /24 Block	256
202.127.2.0/24	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	256
202.127.109.0/24	AS17910	DOS NI ROHA	256
202.127.22.0/24	AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Pingable IPs

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

IP Address	ASN	Details
202.127.235.22	AS4538 China Education and Research Network Center	21.42ms 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
80.201.156.165	AS5432 Proximus NV	4.80ms from Amsterdam, NL
122.154.145.101	AS9931 The Communication Authoity of Thailand, CAT	6.10ms from Bangkok, TH
146.88.114.229	AS19994 Rackspace Hosting	1.15ms from Chicago, US
97.135.245.85	AS6167 Verizon Business	15.81ms from Chicago, US
75.90.41.181	AS7029 Windstream Communications LLC	11.44ms from Chicago, US
41.18.18.5	AS29975 Vodacom	14.29ms from Johannesburg, ZA
191.92.9.245	AS27831 Colombia Móvil	8.13ms from Medellin, CO
120.156.197.149	AS1221 Telstra Limited	5.48ms from Melbourne, AU
4.30.20.53	AS3356 Level 3 Parent, LLC	0.33ms from Miami, US
211.16.74.21	AS4713 NTT Communications Corporation	19.48ms from Osaka, JP
116.94.244.213	AS7679 QTnet,Inc.	8.12ms from Osaka, JP
77.161.246.213	AS1136 KPN B.V.	1.09ms from Amsterdam, NL
92.122.120.133	AS34164 Akamai International B.V.	0.72ms from Dublin, IE
42.150.221.69	AS9824 JCOM Co., Ltd.	19.12ms from Osaka, JP
200.219.173.245	AS11271 SENCINET LATAM BRASIL LTDA	3.00ms from Osasco, BR
45.164.29.69	AS268621 KEEPNET TELECOMUNICAÇÕES LTDA ME	9.99ms from Osasco, BR
201.43.84.149	AS27699 TELEFÔNICA BRASIL S.A	3.26ms from Sao Paulo, BR
191.180.21.5	AS28573 Claro NXT Telecomunicacoes Ltda	5.48ms from Sao Paulo, BR
124.115.190.53	AS4134 CHINANET-BACKBONE	5.83ms from Xi'an, CN
44.243.185.5	AS16509 Amazon.com, Inc.	0.27ms from Boardman, US
189.38.101.69	AS16735 ALGAR TELECOM S/A	5.14ms from Chapeco, BR
174.70.105.133	AS22773 Cox Communications Inc.	12.74ms from Dallas, US
18.164.48.37	AS16509 Amazon.com, Inc.	0.12ms from Paris, FR
119.255.194.69	AS23724 IDC, China Telecommunications Corporation	4.38ms from Beijing, CN
2.221.204.5	AS5607 Sky UK Limited	5.63ms from London, GB

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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