219.244.40.0/21

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	219.244.0.0/14
Registry	APNIC
ID	CERNET-CN

WHOIS Details

inetnum:        219.244.0.0 - 219.247.255.255
netname:        CERNET-CN
descr:          China Education and Research Network
descr:          Xi'an 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:  2020-10-20T00:56:45Z
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 219.244.40.0/21

Range	ASN	Company	Num of IPs
219.244.0.0/14	AS4538	China Education and Research Network	262,144

Nearby Ranges

BGP prefixes that overlap with 219.244.0.0/16

Range	ASN	Company	Num of IPs
219.244.0.0/14	AS4538	China Education and Research Network	262,144
219.244.160.0/19	AS4538	China Education and Research Network	8,192
219.244.192.0/19	AS4538	China Education and Research Network	8,192
219.244.224.0/19	AS4538	China Education and Research Network	8,192
219.244.160.0/19	AS24353	China Education and Research Network	8,192
219.244.112.0/20	AS4538	China Education and Research Network	4,096
219.244.16.0/20	AS4538	China Education and Research Network	4,096
219.244.0.0/20	AS4538	China Education and Research Network	4,096
219.244.80.0/20	AS4538	China Education and Research Network	4,096
219.244.96.0/20	AS4538	China Education and Research Network	4,096
219.244.48.0/20	AS4538	China Education and Research Network	4,096
219.244.128.0/20	AS4538	China Education and Research Network	4,096
219.244.32.0/21	AS4538	China Education and Research Network	2,048
219.244.64.0/21	AS4538	China Education and Research Network	2,048
219.244.222.0/24	AS4538	China Education and Research Network	256
219.244.0.0/24	AS4538	China Education and Research Network	256
219.244.221.0/24	AS4538	China Education and Research Network	256
219.244.212.0/24	AS4538	China Education and Research Network	256
219.244.29.0/24	AS4538	China Education and Research Network	256
219.244.2.0/24	AS4538	China Education and Research Network	256
219.244.18.0/24	AS4538	China Education and Research Network	256
219.244.223.0/24	AS4538	China Education and Research Network	256
219.244.28.0/24	AS4538	China Education and Research Network	256
219.244.16.0/24	AS4538	China Education and Research Network	256
219.244.208.0/24	AS4538	China Education and Research Network	256
219.244.17.0/24	AS4538	China Education and Research Network	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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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
219.244.43.193	AS4538 China Education and Research Network Center	15.91ms from Chengdu, 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
95.211.147.101	AS60781 LeaseWeb Netherlands B.V.	0.24ms from Amsterdam, NL
94.68.182.5	AS6799 Ote SA (Hellenic Telecommunications Organisation)	9.45ms from Athens, GR
73.9.213.229	AS7922 Comcast Cable Communications, LLC	7.06ms from Chicago, US
97.179.40.213	AS6167 Verizon Business	7.66ms from Denver, US
173.212.36.133	AS7250 Surry Telephone Membership Corporation	10.89ms from Durham, US
109.131.154.165	AS5432 Proximus NV	4.90ms from Gravelines, FR
113.75.159.37	AS4134 CHINANET-BACKBONE	8.55ms from Guangzhou, CN
104.12.95.133	AS7018 AT&T Enterprises, LLC	12.76ms from Kansas City, US
51.194.36.133	AS5607 Sky UK Limited	10.20ms from London, GB
172.166.161.5	AS8075 Microsoft Corporation	0.18ms from London, GB
195.206.14.229	AS12445 A2A Smart City S.P.A	1.54ms from Milan, IT
185.198.118.53	AS35051 Nexi Payments S.P.A.	1.56ms from Milan, IT
161.10.55.133	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	10.12ms from Panama, PA
117.200.155.197	AS9829 National Internet Backbone	15.15ms from Saint Thomas Mount, IN
187.234.181.197	AS8151 UNINET	3.47ms from Santiago de Queretaro, MX
77.3.74.165	AS6805 Telefonica Germany GmbH & Co.OHG	1.13ms from Hamburg, DE
194.0.122.213	AS8410 NovInvestRezerv, LLC	0.69ms from Novosibirsk, RU
35.181.104.149	AS16509 Amazon.com, Inc.	0.13ms from Paris, FR
187.37.223.37	AS28573 Claro NXT Telecomunicacoes Ltda	5.46ms from Sao Paulo, BR
222.189.51.37	AS4134 CHINANET-BACKBONE	10.69ms from Shanghai, CN
180.171.218.5	AS4812 China Telecom (Group)	5.08ms from Shanghai, CN
106.167.124.197	AS2516 KDDI CORPORATION	8.49ms from Tokyo, JP
95.51.208.245	AS5617 Orange Polska Spolka Akcyjna	6.21ms from Warsaw, PL
154.247.205.213	AS36947 Telecom Algeria	15.82ms from Algiers, DZ
150.230.22.37	AS31898 Oracle Corporation	0.15ms from Amsterdam, NL

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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