203.124.64.0/20

AS4721 · JCOM Co., Ltd.

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Summary

Country	Japan
Domain	jcom.co.jp
ASN	AS4721
Parent Range	203.124.64.0/19
Registry	APNIC
ID	JCN

WHOIS Details

inetnum:        203.124.64.0 - 203.124.95.255
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:  2021-09-27T07:42:18Z
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:        203.124.64.0 - 203.124.95.255
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:  2021-09-27T23:49:54Z
source:         JPNIC

Overlapping Ranges

BGP prefixes that contain 203.124.64.0/20

Range	ASN	Company	Num of IPs
203.124.64.0/19	AS4721	JCOM Co., Ltd.	8,192

Nearby Ranges

BGP prefixes that overlap with 203.124.0.0/16

Range	ASN	Company	Num of IPs
203.124.64.0/19	AS4721	JCOM Co., Ltd.	8,192
203.124.176.0/20	AS132873	Zettagrid Pty Ltd	4,096
203.124.144.0/20	AS17495	RCOM-STATIC	4,096
203.124.176.0/20	AS7604	Zettagrid Pty Ltd	4,096
203.124.16.0/21	AS55850	Mercury NZ Limited	2,048
203.124.0.0/22	AS3758	SingNet Pte Ltd	1,024
203.124.4.0/23	AS56289	Internet link for two deligated ISPs, DBSVO On-line trading	512
203.124.154.0/24	AS17495	RCOM-STATIC-bangalore	256
203.124.172.0/24	AS17495	RCOM-STATIC-delhi	256
203.124.152.0/24	AS17495	RCOM-STATIC-bangalore	256
203.124.128.0/24	AS17495	RCOM-STATIC-Pune	256
203.124.149.0/24	AS17495	RCOM-STATIC-delhi	256
203.124.140.0/24	AS17495	RCOM-STATIC-bangalore	256
203.124.143.0/24	AS17495	RCOM-STATIC-Pune	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

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

IP Address	ASN	Details
203.124.70.234	AS4721 JCOM Co., Ltd.	`13.08ms` from Tokyo, JP
203.124.65.93	AS4721 JCOM Co., Ltd.	`5.91ms` from Tokyo, JP
203.124.64.1	AS4721 JCOM Co., Ltd.	`2.44ms` from Tokyo, JP
203.124.68.1	AS4721 JCOM Co., Ltd.	`3.99ms` from Tokyo, JP
203.124.76.1	AS4721 JCOM Co., Ltd.	`1.90ms` from Tokyo, JP
203.124.67.1	AS4721 JCOM Co., Ltd.	`2.24ms` from Tokyo, JP
203.124.69.86	AS4721 JCOM Co., Ltd.	`12.21ms` from Tokyo, JP
203.124.77.77	AS4721 JCOM Co., Ltd.	`9.92ms` from Tokyo, JP
203.124.71.1	AS4721 JCOM Co., Ltd.	`10.23ms` from Tokyo, JP
203.124.72.1	AS4721 JCOM Co., Ltd.	`2.92ms` from Tokyo, JP
203.124.79.97	AS4721 JCOM Co., Ltd.	`10.01ms` from Tokyo, JP
203.124.78.156	AS4721 JCOM Co., Ltd.	`11.15ms` 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
97.149.206.164	AS6167 Verizon Business	`17.04ms` from Chicago, US
184.57.56.84	AS10796 Charter Communications Inc	`8.22ms` from Columbus, US
117.245.27.212	AS9829 National Internet Backbone	`12.54ms` from Delhi, IN
189.169.149.164	AS8151 UNINET	`7.28ms` from Guadalajara, MX
116.71.29.180	AS17557 Pakistan Telecommunication Company Limited	`4.05ms` from Islamabad, PK
82.223.162.4	AS8560 IONOS SE	`0.76ms` from Logrono, ES
46.73.6.116	AS12714 PJSC MegaFon	`10.11ms` from Moscow, RU
193.110.140.228	AS29605 Axians Cloud Services Provider	`0.64ms` from Paris, FR
182.34.63.52	AS4134 CHINANET-BACKBONE	`6.27ms` from Qingdao, CN
160.22.44.100	AS138746 Live Fibernet	`10.50ms` from Saint Thomas Mount, IN
12.199.76.4	AS7018 AT&T Enterprises, LLC	`6.34ms` from San Jose, US
222.10.79.180	AS2516 KDDI CORPORATION	`6.57ms` from Tokyo, JP
176.227.160.68	AS58321 Oxylion Sp. z o.o.	`5.41ms` from Warsaw, PL
92.58.245.36	AS12479 Orange Espagne SA	`12.26ms` from Zaragoza, ES
134.76.78.68	AS207592 Gesellschaft fuer wissenschaftliche Datenverarbeitung mbH, Goettingen	`4.44ms` from Frankfurt am Main, DE
95.232.147.212	AS3269 Telecom Italia S.p.A.	`1.34ms` from Milan, IT
116.253.117.100	AS4134 CHINANET-BACKBONE	`3.37ms` from Nanning, CN
96.225.75.180	AS701 Verizon Business	`1.53ms` from New York City, US
113.37.29.52	AS17506 ARTERIA Networks Corporation	`1.29ms` from Osaka, JP
180.147.58.196	AS17511 OPTAGE Inc.	`2.26ms` from Osaka, JP
39.69.134.4	AS4837 CHINA UNICOM China169 Backbone	`5.50ms` from Qingdao, CN
31.154.44.212	AS12400 Partner Communications Ltd.	`0.24ms` from Rosh Ha‘Ayin, IL
188.22.114.132	AS8447 A1 Telekom Austria AG	`6.26ms` from Vienna, AT
212.180.240.4	AS9085 SUPERMEDIA Sp.z.o.o.	`0.44ms` from Warsaw, PL
185.159.88.4	AS205774 TONET d.o.o.	`4.78ms` from Zagreb, HR

Traceroute

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

traceroute -a -n -q1 -f6 203.124.68.114

traceroute to 203.124.68.114 (203.124.68.114): 64 hops max, 52 byte packets

6 [AS5580] 203.190.230.37 11.437 ms

7 [AS9824] 203.165.0.53 1.007 ms

8 *

9 *

10 *

11 [AS4721] 203.124.68.114 18.847 ms

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

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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