223.223.208.0/21

AS4721 · JCOM Co., Ltd.

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Summary

Country	Japan
Domain	jcom.co.jp
ASN	AS4721
Registry	APNIC
ID	JCN

WHOIS Details

inetnum:        223.223.208.0 - 223.223.215.255
netname:        JCN
descr:          JCOM Co., Ltd.
descr:          Daiwa Tower,
descr:          1-2-1 kamiogi,Suginami-ku,Tokyo,Japan
country:        JP
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
status:         ALLOCATED PORTABLE
remarks:        Email address for spam or abuse complaints : abuse@home.ne.jp
mnt-irt:        IRT-JPNIC-JP
mnt-by:         MAINT-JPNIC
mnt-lower:      MAINT-JPNIC
last-modified:  2021-09-27T07:42:21Z
source:         APNIC

irt:            IRT-JPNIC-JP
address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, Japan
e-mail:         hostmaster@nic.ad.jp
abuse-mailbox:  hostmaster@nic.ad.jp
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
auth:           # Filtered
remarks:        hostmaster@nic.ad.jp was validated on 2020-07-23
mnt-by:         MAINT-JPNIC
last-modified:  2022-06-14T04:26:58Z
source:         APNIC

role:           Japan Network Information Center
address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, Japan
country:        JP
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         hostmaster@nic.ad.jp
admin-c:        JI13-AP
tech-c:         JE53-AP
nic-hdl:        JNIC1-AP
mnt-by:         MAINT-JPNIC
last-modified:  2022-01-05T03:04:02Z
source:         APNIC

inetnum:        223.223.208.0 - 223.223.215.255
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
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)
last-modified:  2021-09-27T23:51:15Z
source:         JPNIC

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

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

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

IP Address	ASN	Details
223.223.212.1	AS4721 JCOM Co., Ltd.	`4.41ms` from Tokyo, JP
223.223.209.81	AS4721 JCOM Co., Ltd.	`9.59ms` from Tokyo, JP
223.223.213.122	AS4721 JCOM Co., Ltd.	`5.39ms` from Tokyo, JP
223.223.211.74	AS4721 JCOM Co., Ltd.	`10.52ms` from Tokyo, JP
223.223.210.1	AS4721 JCOM Co., Ltd.	`3.88ms` from Tokyo, JP
223.223.214.1	AS4721 JCOM Co., Ltd.	`3.00ms` from Tokyo, JP
223.223.208.1	AS4721 JCOM Co., Ltd.	`3.97ms` from Tokyo, JP

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
202.99.161.53	AS4837 CHINA UNICOM China169 Backbone	`8.17ms` from Beijing, CN
35.205.76.69	AS396982 Google LLC	`0.13ms` from Brussels, BE
41.45.46.213	AS8452 TE-AS	`3.77ms` from Cairo, EG
196.127.193.149	AS36925 MEDITELECOM	`3.60ms` from Casablanca, MA
87.130.37.21	AS3320 Deutsche Telekom AG	`0.95ms` from Frankfurt am Main, DE
188.174.144.229	AS8767 M-net Telekommunikations GmbH	`9.55ms` from Frankfurt am Main, DE
194.33.17.21	AS197380 ITpoint Systems AG	`3.02ms` from Geneve, CH
77.83.124.101	AS200738 FIBRAWORLD TELECOM S.A.U.	`6.93ms` from Madrid, ES
50.114.176.5	AS44477 PQ HOSTING PLUS S.R.L.	`0.17ms` from Madrid, ES
69.139.37.85	AS7922 Comcast Cable Communications, LLC	`5.91ms` from Miami, US
217.20.157.181	AS47764 LLC VK	`0.92ms` from Moscow, RU
60.96.244.85	AS17676 SoftBank Corp.	`3.77ms` from Osaka, JP
189.47.245.229	AS27699 TELEFÔNICA BRASIL S.A	`1.72ms` from Osasco, BR
63.239.36.37	AS209 CenturyLink Communications, LLC	`5.74ms` from Secaucus, US
106.243.182.229	AS3786 LG DACOM Corporation	`1.83ms` from Seoul, KR
77.138.67.213	AS12849 Hot-Net internet services Ltd.	`11.61ms` from Tel Aviv, IL
178.73.32.197	AS9141 P4 Sp. z o.o.	`0.70ms` from Warsaw, PL
188.130.237.5	AS44834 Pozitiv Telecom Ltd.	`5.53ms` from Yekaterinburg, RU
110.170.8.37	AS7470 TRUE INTERNET Co.,Ltd.	`0.68ms` from Bangkok, TH
76.118.255.21	AS7922 Comcast Cable Communications, LLC	`8.19ms` from Boston, US
223.83.188.181	AS9808 China Mobile Communications Group Co., Ltd.	`17.13ms` from Changsha, CN
24.14.63.149	AS7922 Comcast Cable Communications, LLC	`7.23ms` from Chicago, US
3.17.43.197	AS16509 Amazon.com, Inc.	`0.16ms` from Columbus, US
67.211.60.37	AS13354 zColo	`1.55ms` from Dallas, US
13.224.129.69	AS16509 Amazon.com, Inc.	`0.73ms` 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 223.223.214.1

traceroute to 223.223.214.1 (223.223.214.1): 64 hops max, 52 byte packets

6 [AS5580] 203.190.230.37 1.067 ms

7 [AS9824] 203.165.0.53 0.861 ms

8 *

9 *

10 [AS4721] 223.223.214.1 95.658 ms

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

On August 22nd 2025

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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