211.19.208.0/21

AS4721 · JCOM Co., Ltd.

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Summary

Country	Japan
Domain	jcom.co.jp
ASN	AS4721
Parent Range	211.19.208.0/20
Registry	JPNIC
ID	JCN-CIDR-BLK-JP

WHOIS Details

inetnum:        211.19.208.0 - 211.19.223.255
netname:        JCN-CIDR-BLK-JP
descr:          JCOM Co., Ltd.
remarks:        Email address for spam or abuse complaints : abuse@home.ne.jp
country:        JP
admin-c:        JP00006551
tech-c:         JP00006551
last-modified:  2021-09-27T23:54:18Z
remarks:        This information has been partially mirrored by APNIC from
remarks:        JPNIC. To obtain more specific information, please use the
remarks:        JPNIC WHOIS Gateway at
remarks:        http://www.nic.ad.jp/en/db/whois/en-gateway.html or
remarks:        whois.nic.ad.jp for WHOIS client. (The WHOIS client
remarks:        defaults to Japanese output, use the /e switch for English
remarks:        output)
source:         JPNIC

Overlapping Ranges

BGP prefixes that contain 211.19.208.0/21

Range	ASN	Company	Num of IPs
211.19.208.0/20	AS4721	JCOM Co., Ltd.	4,096

Nearby Ranges

BGP prefixes that overlap with 211.19.0.0/16

Range	ASN	Company	Num of IPs
211.19.64.0/18	AS9595	NTT-ME Corporation	16,384
211.19.224.0/19	AS23780	CTB Media Inc.	8,192
211.19.16.0/20	AS23641	NS Computer Service Corporation	4,096
211.19.208.0/20	AS4721	JCOM Co., Ltd.	4,096
211.19.48.0/20	AS17931	Netforest,Inc	4,096
211.19.196.0/22	AS23778	IMIZU CABLE NETWORK CO.,LTD.	1,024
211.19.192.0/22	AS7672	Hokuden Information System Service Co.,Ltd.	1,024
211.19.39.0/24	AS10006	MKI Network Solutions, Ltd.	256

Hosted domains

There are no domains currently hosted on this ASN.

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

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
102.141.17.69	AS36924 GVA Cote d'Ivoire SAS	`9.29ms` from Brazzaville, CG
216.68.140.85	AS6181 Cincinnati Bell Telephone Company LLC	`1.46ms` from Cincinnati, US
74.132.102.181	AS10796 Charter Communications Inc	`16.80ms` from Columbus, US
85.208.141.85	AS202047 BREAK FREE TELECOM SL	`9.65ms` from Madrid, ES
179.26.60.69	AS6057 Administracion Nacional de Telecomunicaciones	`1.87ms` from Montevideo, UY
62.211.99.197	AS3269 Telecom Italia S.p.A.	`4.60ms` from Naples, IT
64.190.28.197	AS11696 Fusion, LLC	`0.81ms` from New York City, US
107.144.84.229	AS33363 Charter Communications, Inc	`12.61ms` from Orlando, US
14.39.250.101	AS4766 Korea Telecom	`1.15ms` from Seoul, KR
27.129.8.5	AS4134 CHINANET-BACKBONE	`6.98ms` from Shijiazhuang, CN
120.96.131.117	AS1659 Taiwan Academic Network (TANet) Information Center	`1.85ms` from Taipei, TW
163.29.212.5	AS4782 Data Communication Business Group	`2.28ms` from Taipei, TW
197.9.233.5	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`18.75ms` from Tunis, TN
197.239.103.5	AS37577 Orange Burkina Faso	`15.61ms` from Accra, GH
20.121.143.245	AS8075 Microsoft Corporation	`0.65ms` from Ashburn, US
184.68.104.213	AS6327 Shaw Communications	`1.02ms` from Calgary, CA
52.30.233.69	AS16509 Amazon.com, Inc.	`0.15ms` from Dublin, IE
172.104.250.133	AS63949 Akamai Connected Cloud	`0.13ms` from Frankfurt am Main, DE
223.16.247.53	AS9304 HGC Global Communications Limited	`2.05ms` from Hong Kong, HK
105.172.82.165	AS37119 UNITEL SA	`1.31ms` from Luanda, AO
118.243.16.197	AS4685 Asahi Net	`1.65ms` from Osaka, JP
193.213.35.213	AS2119 Telenor Norge AS	`0.77ms` from Oslo, NO
181.112.136.85	AS28006 CORPORACION NACIONAL DE TELECOMUNICACIONES - CNT EP	`1.12ms` from Quito, EC
2.70.35.117	AS44034 Hi3G Access AB	`11.95ms` from Stockholm, SE
217.146.66.5	AS49604 Zone Media OU	`0.69ms` from Tallinn, EE

Traceroute

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

traceroute -a -n -q1 -f4 -m7 211.19.208.115

traceroute to 211.19.208.115 (211.19.208.115): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.065 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Liuzhou, CN

On March 14th 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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