203.137.0.0/16

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:        203.137.0.0 - 203.137.120.255
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:  2020-06-13T03:27:32Z
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

Nearby Ranges

BGP prefixes that overlap with 203.0.0.0/8

Range	ASN	Company	Num of IPs
203.40.0.0/13	AS1221	Telstra Limited	524,288
203.36.0.0/14	AS1221	Telstra Limited	262,144
203.48.0.0/14	AS1221	Telstra Limited	262,144
203.52.0.0/15	AS1221	Telstra Limited	131,072
203.102.0.0/15	AS703	Verizon Australia PTY Limited	131,072
203.64.0.0/16	AS1659	Taiwan Academic Network	65,536
203.177.0.0/16	AS17894	Globe Telecom	65,536
203.157.0.0/16	AS9649	Ministry of Public Health, Thailand	65,536
203.66.0.0/16	AS3462	Data Communication Business Group,	65,536
203.68.0.0/16	AS1659	Taiwan Academic Network	65,536
203.206.0.0/16	AS4739	iiNet Limited	65,536
203.155.0.0/16	AS55844	KSC Commercial Internet Co. Ltd.	65,536
203.155.0.0/16	AS7693	KSC Commercial Internet Co. Ltd.	65,536
203.224.0.0/16	AS9273	ITCENENTEC CO.,LTD.	65,536
203.75.0.0/16	AS3462	Data Communication Business Group,	65,536
203.74.0.0/16	AS3462	Data Communication Business Group,	65,536
203.218.0.0/16	AS4760	PCCW Limited	65,536
203.63.0.0/16	AS2764	AAPT Limited	65,536
203.70.0.0/16	AS4780	Digital United Inc.	65,536
203.67.0.0/16	AS4780	Digital United Inc.	65,536
203.59.0.0/16	AS4739	iiNet Limited	65,536
203.177.0.0/16	AS24179	Globe Telecom	65,536
203.225.0.0/16	AS4766	KOLON BENIT	65,536
203.61.0.0/16	AS703	Verizon Australia PTY Limited	65,536
203.69.0.0/16	AS3462	Data Communication Business Group,	65,536
203.125.0.0/16	AS3758	SingNet Pte Ltd	65,536
203.231.0.0/16	AS9848	SEJONG NETWORKS	65,536
203.177.0.0/16	AS4775	Globe Telecom	65,536
203.85.0.0/16	AS4058	CITIC Telecom International CPC Limited	65,536
203.155.0.0/16	AS45197	KSC Commercial Internet Co. Ltd.	65,536
203.231.0.0/16	AS17881	SEJONG NETWORKS	65,536
203.200.0.0/16	AS4755	Internet Service Provider	65,536
203.74.0.0/16	AS131660	Data Communication Business Group,	65,536
203.155.0.0/16	AS23644	KSC Commercial Internet Co. Ltd.	65,536
203.108.0.0/16	AS703	OzEmail Pty Ltd	65,536
203.177.0.0/16	AS132595	Globe Telecom	65,536
203.138.0.0/16	AS2514	NTT PC Communications,Inc.	65,536
203.197.0.0/16	AS4755	Internet Service Provider	65,536
203.227.0.0/16	AS9848	SEJONG NETWORKS	65,536
203.73.0.0/16	AS4780	Digital United Inc.	65,536
203.219.0.0/16	AS7545	TPG Internet Pty Ltd.	65,536
203.151.0.0/16	AS56223	Internet Thailand Company Limited	65,536
203.54.0.0/16	AS1221	Telstra Limited	65,536
203.231.0.0/16	AS9973	SEJONG NETWORKS	65,536
203.231.0.0/16	AS3608	SEJONG NETWORKS	65,536
203.231.0.0/16	AS214432	SEJONG NETWORKS	65,536
203.154.0.0/16	AS4618	Internet Thailand Company Limited	65,536
203.59.0.0/16	AS7545	iiNet Limited	65,536
203.227.0.0/16	AS23584	SEJONG NETWORKS	65,536
203.151.0.0/16	AS4618	Internet Thailand Company Limited	65,536

Hosted domains

There are 7,550 domain names hosted across 1,392 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

7,758 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.137.61.26	AS4694 IDC Frontier Inc.	`0.93ms` from Osaka, JP
203.137.100.118	AS4694 IDC Frontier Inc.	`0.57ms` from Osaka, JP
203.137.3.2	AS4694 IDC Frontier Inc.	`0.84ms` from Osaka, JP
203.137.187.120	AS4694 IDC Frontier Inc.	`3.63ms` from Tokyo, JP
203.137.113.198	AS4694 IDC Frontier Inc.	`0.60ms` from Osaka, JP
203.137.128.83	AS4694 IDC Frontier Inc.	`0.81ms` from Tokyo, JP
203.137.185.5	AS4694 IDC Frontier Inc.	`3.62ms` from Tokyo, JP
203.137.20.129	AS4694 IDC Frontier Inc.	`0.83ms` from Osaka, JP
203.137.196.96	AS4694 IDC Frontier Inc.	`6.94ms` from Osaka, JP
203.137.133.40	AS4694 IDC Frontier Inc.	`0.86ms` from Tokyo, JP
203.137.174.35	AS4694 IDC Frontier Inc.	`3.53ms` from Tokyo, JP
203.137.54.1	AS4694 IDC Frontier Inc.	`0.44ms` from Osaka, JP
203.137.103.120	AS4694 IDC Frontier Inc.	`0.64ms` from Osaka, JP
203.137.82.129	AS4694 IDC Frontier Inc.	`0.90ms` from Osaka, JP
203.137.78.9	AS4694 IDC Frontier Inc.	`0.52ms` from Osaka, JP
203.137.191.252	AS4694 IDC Frontier Inc.	`3.60ms` from Tokyo, JP
203.137.176.198	AS4694 IDC Frontier Inc.	`3.54ms` from Tokyo, JP
203.137.162.214	AS4694 IDC Frontier Inc.	`3.54ms` from Tokyo, JP
203.137.30.129	AS4694 IDC Frontier Inc.	`0.77ms` from Osaka, JP
203.137.22.1	AS4694 IDC Frontier Inc.	`0.57ms` from Osaka, JP
203.137.21.130	AS4694 IDC Frontier Inc.	`0.82ms` from Osaka, JP
203.137.56.2	AS4694 IDC Frontier Inc.	`0.89ms` from Osaka, JP
203.137.167.27	AS4694 IDC Frontier Inc.	`3.58ms` from Tokyo, JP
203.137.108.23	AS4694 IDC Frontier Inc.	`0.50ms` from Osaka, JP
203.137.104.2	AS4694 IDC Frontier Inc.	`0.50ms` from Osaka, 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
97.95.185.64	AS20115 Charter Communications LLC	`12.24ms` from Ashburn, US
129.92.51.64	AS668 United States Department of Defense (DoD)	`4.16ms` from Chicago, US
140.245.65.96	AS31898 Oracle Corporation	`0.17ms` from Chuncheon, KR
34.55.91.176	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
52.59.122.208	AS16509 Amazon.com, Inc.	`0.18ms` from Frankfurt am Main, DE
46.63.49.48	AS51784 X-City Ltd.	`0.81ms` from Khmelnytskyi, UA
128.49.110.224	AS22 Navy Network Information Center (NNIC)	`1.78ms` from Los Angeles, US
162.218.29.32	AS8796 FASTNET DATA INC	`0.28ms` from Los Angeles, US
35.190.112.224	AS396982 Google LLC	`0.07ms` from Melbourne, AU
217.57.85.112	AS3269 Telecom Italia S.p.A.	`4.90ms` from Milan, IT
182.165.181.208	AS17511 OPTAGE Inc.	`1.45ms` from Osaka, JP
60.149.60.112	AS17676 SoftBank Corp.	`3.52ms` from Osaka, JP
125.11.235.240	AS9824 JCOM Co., Ltd.	`12.46ms` from Osaka, JP
62.160.78.176	AS3215 Orange S.A.	`1.07ms` from Paris, FR
94.97.70.80	AS25019 Saudi Telecom Company JSC	`0.78ms` from Riyadh, SA
66.114.62.64	AS54994 Meteverse Limited.	`0.65ms` from San Jose, US
23.108.193.32	AS7203 Leaseweb USA, Inc.	`12.58ms` from San Jose, US
179.157.126.224	AS28573 Claro NXT Telecomunicacoes Ltda	`3.95ms` from Sao Paulo, BR
52.65.110.64	AS16509 Amazon.com, Inc.	`0.15ms` from Sydney, AU
221.171.46.128	AS2518 BIGLOBE Inc.	`6.59ms` from Tokyo, JP
190.51.234.16	AS22927 Telefonica de Argentina	`2.16ms` from Buenos Aires, AR
196.217.68.240	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`6.66ms` from Casablanca, MA
14.187.222.208	AS45899 VNPT Corp	`1.59ms` from Ho Chi Minh City, VN
195.155.109.192	AS34984 Superonline Iletisim Hizmetleri A.S.	`1.96ms` from Istanbul, TR
196.36.76.208	AS3741 Dimension Data	`0.46ms` from Johannesburg, ZA

Traceroute

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

traceroute -a -n -q1 -f5 203.137.2.1

traceroute to 203.137.2.1 (203.137.2.1): 64 hops max, 52 byte packets

5 [] 218.100.9.89 0.236 ms

6 [] 218.100.9.23 0.355 ms

7 *

8 *

9 *

10 [AS4694] 203.137.2.1 1.255 ms

Measurement taken from

IPinfo ProbeNet in Osaka, 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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