219.243.210.0/23

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	219.242.0.0/15
Registry	APNIC
ID	CERNET-CN

WHOIS Details

inetnum:        219.242.0.0 - 219.243.255.255
netname:        CERNET-CN
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:  2020-10-20T00:56:47Z
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 2025-08-15
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-11-18T00:26:28Z
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 2025-08-15
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-15T09:38:28Z
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 219.243.210.0/23

Range	ASN	Company	Num of IPs
219.242.0.0/15	AS4538	China Education and Research Network	131,072

Nearby Ranges

BGP prefixes that overlap with 219.243.0.0/16

Range	ASN	Company	Num of IPs
219.242.0.0/15	AS4538	China Education and Research Network	131,072

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
219.243.211.253	tunel.edu.cn	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

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

IP Address	ASN	Details
219.243.210.222	AS4538 China Education and Research Network Center	`2.92ms` from Beijing, CN
219.243.211.212	AS4538 China Education and Research Network Center	`3.02ms` 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
69.251.46.119	AS7922 Comcast Cable Communications, LLC	`7.56ms` from Ashburn, US
108.246.31.215	AS7018 AT&T Enterprises, LLC	`3.41ms` from Atlanta, US
119.54.45.167	AS4837 CHINA UNICOM China169 Backbone	`1.24ms` from Changchun, CN
162.194.142.7	AS7018 AT&T Enterprises, LLC	`9.22ms` from Chicago, US
52.28.191.199	AS16509 Amazon.com, Inc.	`0.15ms` from Frankfurt am Main, DE
220.71.151.103	AS4766 Korea Telecom	`5.39ms` from Incheon, KR
122.171.9.23	AS24560 Bharti Airtel Ltd., Telemedia Services	`13.20ms` from Kolkata, IN
85.138.85.247	AS2860 NOS COMUNICACOES, S.A.	`10.34ms` from Lisbon, PT
1.123.199.247	AS1221 Telstra Limited	`8.91ms` from Melbourne, AU
187.145.223.135	AS8151 UNINET	`1.66ms` from Mexico City, MX
98.15.113.199	AS12271 Charter Communications Inc	`3.73ms` from New York City, US
94.24.31.231	AS39305 Groupe convergence.com SAS	`0.46ms` from Paris, FR
150.158.47.215	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.24ms` from Shanghai, CN
126.41.207.151	AS17676 SoftBank Corp.	`4.68ms` from Tokyo, JP
199.26.114.231	AS394117 Encore Communications, Inc	`1.02ms` from Tulsa, US
85.4.171.55	AS3303 Swisscom (Switzerland) Ltd	`2.57ms` from Zuerich, CH
79.166.118.87	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	`1.04ms` from Athens, GR
91.178.67.119	AS5432 Proximus NV	`1.22ms` from Brussels, BE
65.114.114.7	AS209 CenturyLink Communications, LLC	`2.34ms` from Chicago, US
18.223.136.103	AS16509 Amazon.com, Inc.	`1.05ms` from Columbus, US
73.26.111.215	AS7922 Comcast Cable Communications, LLC	`9.16ms` from Denver, US
165.154.24.7	AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED	`1.51ms` from Hong Kong, HK
136.32.81.71	AS16591 Google Fiber Inc.	`0.75ms` from Kansas City, US
202.188.238.7	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`1.02ms` from Kuala Lumpur, MY
80.6.34.135	AS5089 Virgin Media Limited	`3.53ms` from London, GB

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f6 219.243.210.221

traceroute to 219.243.210.221 (219.243.210.221): 64 hops max, 52 byte packets

6 [AS4538] 101.4.130.105 5.823 ms

7 *

8 *

9 *

10 [AS4538] 219.243.214.254 6.789 ms

11 [AS4538] 219.243.210.5 16.405 ms

12 [AS4538] 219.243.210.221 2.873 ms

Measurement taken from

IPinfo ProbeNet in Beijing, CN

On January 19th 2026

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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