219.231.128.0/20

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	219.224.0.0/13
Registry	APNIC
ID	CERNET-CN

WHOIS Details

inetnum:        219.230.0.0 - 219.231.255.255
netname:        CERNET-CN
descr:          China Education and Research Network
descr:          Nanjing 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:  2020-09-03T09:16:27Z
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 219.231.128.0/20

Range	ASN	Company	Num of IPs
219.224.0.0/13	AS4538	China Education and Research Network	524,288

Nearby Ranges

BGP prefixes that overlap with 219.231.0.0/16

Range	ASN	Company	Num of IPs
219.224.0.0/13	AS4538	China Education and Research Network	524,288
219.231.192.0/20	AS4538	China Education and Research Network	4,096
219.231.176.0/20	AS4538	China Education and Research Network	4,096
219.231.32.0/20	AS4538	China Education and Research Network	4,096
219.231.144.0/20	AS4538	China Education and Research Network	4,096
219.231.160.0/20	AS4538	China Education and Research Network	4,096
219.231.0.0/20	AS4538	China Education and Research Network	4,096
219.231.56.0/21	AS4538	China Education and Research Network	2,048
219.231.208.0/21	AS4538	China Education and Research Network	2,048
219.231.16.0/21	AS4538	China Education and Research Network	2,048
219.231.216.0/21	AS4538	China Education and Research Network	2,048
219.231.48.0/21	AS4538	China Education and Research Network	2,048
219.231.240.0/21	AS4538	China Education and Research Network	2,048
219.231.24.0/23	AS4538	China Education and Research Network	512
219.231.35.0/24	AS4538	China Education and Research Network	256

Hosted domains

There are 2 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

3,928 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
219.231.139.146	AS4538 China Education and Research Network Center	9.50ms from Beijing, CN
219.231.131.171	AS4538 China Education and Research Network Center	8.78ms from Beijing, CN
219.231.136.57	AS4538 China Education and Research Network Center	9.47ms from Beijing, CN
219.231.137.131	AS4538 China Education and Research Network Center	9.44ms from Beijing, CN
219.231.132.41	AS4538 China Education and Research Network Center	8.85ms from Beijing, CN
219.231.128.10	AS4538 China Education and Research Network Center	8.53ms from Beijing, CN
219.231.142.29	AS4538 China Education and Research Network Center	8.65ms from Beijing, CN
219.231.129.251	AS4538 China Education and Research Network Center	9.04ms from Beijing, CN
219.231.133.120	AS4538 China Education and Research Network Center	8.64ms from Beijing, CN
219.231.140.230	AS4538 China Education and Research Network Center	9.45ms from Beijing, CN
219.231.130.216	AS4538 China Education and Research Network Center	9.48ms from Beijing, CN
219.231.135.214	AS4538 China Education and Research Network Center	8.85ms from Beijing, CN
219.231.134.197	AS4538 China Education and Research Network Center	9.49ms from Beijing, CN
219.231.143.42	AS4538 China Education and Research Network Center	9.51ms from Beijing, CN
219.231.141.56	AS4538 China Education and Research Network Center	8.51ms from Beijing, CN
219.231.138.244	AS4538 China Education and Research Network Center	9.16ms 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
179.38.77.164	AS22927 Telefonica de Argentina	1.78ms from Buenos Aires, AR
5.230.127.36	AS12586 GHOSTnet GmbH	0.28ms from Frankfurt am Main, DE
134.56.253.180	AS23089 Hotwire Communications	2.16ms from Miami, US
210.181.134.228	AS4766 Korea Telecom	5.08ms from Seoul, KR
59.126.189.244	AS3462 Data Communication Business Group	2.11ms from Taichung, TW
147.75.179.132	AS30109 Medallia Inc.	0.88ms from Toronto, CA
154.8.142.4	AS45090 Shenzhen Tencent Computer Systems Company Limited	2.23ms from Beijing, CN
24.12.243.84	AS7922 Comcast Cable Communications, LLC	5.50ms from Chicago, US
217.136.129.116	AS5432 Proximus NV	3.84ms from Gravelines, FR
45.151.83.4	AS60439 SERVERNET INTERNET LIMITED	0.25ms from London, GB
31.36.112.244	AS5410 Bouygues Telecom SA	9.57ms from Marseille, FR
181.128.28.36	AS13489 UNE EPM TELECOMUNICACIONES S.A.	1.62ms from Medellin, CO
199.102.239.68	AS21554 Wisconsin CyberLynk Network, Inc.	0.26ms from Milwaukee, US
108.14.254.52	AS701 Verizon Business	2.56ms from New York City, US
61.81.91.20	AS4766 Korea Telecom	5.33ms from Seoul, KR
133.232.225.228	AS2514 NTT PC Communications, Inc.	6.46ms from Tokyo, JP
185.29.25.4	AS200128 DNHOST IKE	1.24ms from Athens, GR
101.27.170.100	AS4837 CHINA UNICOM China169 Backbone	12.51ms from Beijing, CN
63.35.209.36	AS16509 Amazon.com, Inc.	0.16ms from Dublin, IE
23.64.45.116	AS16625 Akamai Technologies, Inc.	0.39ms from London, GB
13.38.69.68	AS16509 Amazon.com, Inc.	0.12ms from Paris, FR
199.224.101.4	AS3593 Frontier Communications of America, Inc.	12.54ms from Ashburn, US
181.12.192.228	AS7303 Telecom Argentina S.A.	1.52ms from Buenos Aires, AR
198.166.94.100	AS852 TELUS Communications Inc.	5.28ms from Calgary, CA
34.251.183.180	AS16509 Amazon.com, Inc.	0.11ms from Dublin, IE

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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