203.183.128.0/20

AS4694 · IDC Frontier Inc.

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Summary

Country	Japan
Domain	idcf.jp
ASN	AS4694
Registry	JPNIC
ID	IDCFNET-CIDR-BLK-JP

WHOIS Details

inetnum:        203.183.0.0 - 203.183.152.255
netname:        IDCFNet-CIDR-BLK-JP
descr:          IDC Frontier Inc.
remarks:        Email address for spam or abuse complaints : abuse@idc.jp
country:        JP
admin-c:        JP00169834
tech-c:         JP00169834
last-modified:  2020-06-13T03:27:48Z
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

Hosted domains

There are 464 domain names hosted across 103 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.183.138.23	reple.co.jp	76
203.183.138.18	honest-inc.co.jp	59
203.183.138.60	house-labo.co.jp	48
203.183.138.104	nikoh.info	42
203.183.143.252	biccloud.jp	7
203.183.138.14	tantei-databank.jp	6
203.183.138.5	hugflowers-online.net	5
203.183.138.29	wa-lk.co.jp	4
203.183.138.12	wasse-job.com	4
203.183.143.179	k-michibiki.jp	3
203.183.142.138	09auto.biz	2
203.183.138.35	gcom-grp.co.jp	2
203.183.138.15	tsp-corp.net	2
203.183.138.36	g-com.jp	2
203.183.143.222	horrorinthedark.com	2
203.183.143.203	decoland.tv	2
203.183.143.180	webrootsecure.net	1
203.183.139.2	halbum.com	1
203.183.143.217	sexydx.net	1
203.183.143.216	nkdn.jp	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

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Pingable IPs

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

IP Address	ASN	Details
203.183.143.203	AS4694 IDC Frontier Inc.	`0.71ms` from Tokyo, JP
203.183.139.66	AS4694 IDC Frontier Inc.	`1.20ms` from Tokyo, JP
203.183.142.228	AS4694 IDC Frontier Inc.	`0.97ms` from Tokyo, JP
203.183.133.129	AS4694 IDC Frontier Inc.	`1.40ms` from Tokyo, JP
203.183.141.252	AS4694 IDC Frontier Inc.	`0.64ms` from Tokyo, JP
203.183.138.92	AS4694 IDC Frontier Inc.	`0.62ms` from Tokyo, JP
203.183.135.1	AS4694 IDC Frontier Inc.	`1.34ms` from Tokyo, JP
203.183.130.25	AS4694 IDC Frontier Inc.	`1.03ms` from Tokyo, JP
203.183.136.19	AS4694 IDC Frontier Inc.	`0.58ms` 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
154.61.85.4	AS174 Cogent Communications	`0.31ms` from Amsterdam, NL
73.86.147.228	AS7922 Comcast Cable Communications, LLC	`6.99ms` from Ashburn, US
100.21.206.132	AS16509 Amazon.com, Inc.	`0.13ms` from Boardman, US
218.203.249.84	AS9808 China Mobile Communications Group Co., Ltd.	`3.72ms` from Chengdu, CN
77.66.37.244	AS47292 Sentia Denmark A/S	`0.74ms` from Copenhagen, DK
152.53.236.68	AS197540 netcup GmbH	`3.24ms` from Frankfurt am Main, DE
38.239.247.180	AS134548 DXTL Tseung Kwan O Service	`0.77ms` from Hong Kong, HK
194.73.104.68	AS2856 British Telecommunications PLC	`3.13ms` from London, GB
84.67.170.148	AS5378 Vodafone Limited	`3.65ms` from London, GB
90.65.240.4	AS3215 Orange S.A.	`3.51ms` from Lyon, FR
118.88.8.20	AS38909 ARLINE BERBA ESTRADA t/a ARDION LINE WEB DESIGN	`1.25ms` from Manila, PH
206.253.170.100	AS33724 VOLICO	`1.38ms` from Miami, US
37.103.130.244	AS1267 WIND TRE S.P.A.	`3.79ms` from Milan, IT
82.59.243.180	AS3269 Telecom Italia S.p.A.	`16.52ms` from Milan, IT
212.98.189.20	AS12406 Business Network Ltd	`0.89ms` from Minsk, BY
60.100.211.148	AS17676 SoftBank Corp.	`3.94ms` from Osaka, JP
89.192.139.4	AS8011 MongoDB, Inc.	`0.12ms` from Reston, US
187.16.88.228	AS17222 MUNDIVOX DO BRASIL LTDA	`0.58ms` from Rio de Janeiro, BR
192.140.39.228	AS266202 C-Net Internet LTDA	`7.63ms` from Rio de Janeiro, BR
213.178.32.116	AS8439 JSC AIST	`4.02ms` from Samara, RU
61.72.202.244	AS4766 Korea Telecom	`1.36ms` from Seoul, KR
180.64.107.148	AS9318 SK Broadband Co Ltd	`1.47ms` from Seoul, KR
110.46.9.4	AS9845 LG HelloVision Corp.	`11.97ms` from Seoul, KR
47.236.58.228	AS45102 Alibaba (US) Technology Co., Ltd.	`0.61ms` from Singapore, SG
52.69.13.180	AS16509 Amazon.com, Inc.	`0.18ms` from Tokyo, JP

Traceroute

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

traceroute -a -n -q1 -f2 203.183.136.248

traceroute to 203.183.136.248 (203.183.136.248): 64 hops max, 52 byte packets

2 [] 210.171.224.49 0.553 ms

3 *

4 *

5 *

6 [AS4694] 203.183.136.248 1.073 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.

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