61.203.240.0/20

AS4721 · JCOM Co., Ltd.

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Summary

Country	Japan
Domain	jcom.co.jp
ASN	AS4721
Parent Range	61.203.224.0/19
Registry	JPNIC
ID	JCOM-NET

WHOIS Details

inetnum:        61.203.240.0 - 61.203.247.255
netname:        JCOM-NET
descr:          Jupiter Telecommunications Co., Ltd.
country:        JP
admin-c:        JP00006551
tech-c:         JP00006551
last-modified:  2015-11-25T04:26:11Z
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 61.203.240.0/20

Range	ASN	Company	Num of IPs
61.203.224.0/19	AS4721	JCOM Co., Ltd.	8,192

Nearby Ranges

BGP prefixes that overlap with 61.203.0.0/16

Range	ASN	Company	Num of IPs
61.203.0.0/17	AS2518	BIGLOBE Inc.	32,768
61.203.224.0/19	AS4721	JCOM Co., Ltd.	8,192
61.203.192.0/19	AS7679	QTnet,Inc.	8,192
61.203.176.0/20	AS4694	IDC Frontier Inc.	4,096
61.203.128.0/20	AS17676	SoftBank Corp.	4,096
61.203.224.0/20	AS4721	Jupiter Telecommunications Co., Ltd.	4,096
61.203.168.0/21	AS10013	FreeBit Co., Ltd.	2,048
61.203.164.0/22	AS10013	FreeBit Co., Ltd.	1,024

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
61.203.244.235	usamibank.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

Read more

Pingable IPs

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

IP Address	ASN	Details
61.203.247.87	AS4721 JCOM Co., Ltd.	`12.49ms` from Tokyo, JP
61.203.248.1	AS4721 JCOM Co., Ltd.	`2.60ms` from Tokyo, JP
61.203.243.33	AS4721 JCOM Co., Ltd.	`11.11ms` from Tokyo, JP
61.203.249.145	AS4721 JCOM Co., Ltd.	`2.67ms` from Tokyo, JP
61.203.245.16	AS4721 JCOM Co., Ltd.	`13.03ms` from Tokyo, JP
61.203.241.199	AS4721 JCOM Co., Ltd.	`10.65ms` from Tokyo, JP
61.203.246.2	AS4721 JCOM Co., Ltd.	`11.69ms` from Tokyo, JP
61.203.250.1	AS4721 JCOM Co., Ltd.	`2.59ms` from Tokyo, JP
61.203.244.1	AS4721 JCOM Co., Ltd.	`4.02ms` from Tokyo, JP
61.203.242.20	AS4721 JCOM Co., Ltd.	`11.84ms` from Tokyo, JP
61.203.240.1	AS4721 JCOM Co., Ltd.	`3.96ms` 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
24.56.125.244	AS4922 Shenandoah Cable Television LLC	`15.11ms` from Ashburn, US
70.22.189.148	AS701 Verizon Business	`1.19ms` from Boston, US
68.84.155.52	AS7922 Comcast Cable Communications, LLC	`12.32ms` from Denver, US
62.167.52.228	AS6730 Sunrise GmbH	`6.37ms` from Geneve, CH
45.253.117.164	AS45062 Netease-Network	`5.00ms` from Hangzhou, CN
14.183.161.116	AS45899 VNPT Corp	`3.13ms` from Ho Chi Minh City, VN
210.184.201.4	AS9729 iAdvantage Limited	`2.04ms` from Hong Kong, HK
96.11.46.36	AS10796 Charter Communications Inc	`5.03ms` from Milwaukee, US
65.117.229.68	AS53316 CHEETAHMAIL	`1.45ms` from New York City, US
177.149.169.84	AS26615 TIM S/A	`1.42ms` from Osasco, BR
104.253.134.68	AS54252 Sprious LLC	`0.09ms` from Paris, FR
3.238.102.116	AS14618 Amazon.com, Inc.	`0.17ms` from Reston, US
91.226.108.4	AS34405 Anci Digitale S.P.A.	`1.31ms` from Rome, IT
78.20.241.180	AS6848 Telenet BV	`8.17ms` from Roubaix, FR
186.26.114.148	AS14754 TELECOMUNICACIONES DE GUATEMALA, SOCIEDAD ANONIMA	`1.29ms` from San Jose, CR
168.212.154.100	AS10430 Washington State K-20 Telecommunications Network	`8.73ms` from Seattle, US
83.241.243.132	AS12552 GlobalConnect AB	`0.65ms` from Stockholm, SE
203.132.77.132	AS24233 SUPERLOOP (BigAir)	`0.38ms` from Sydney, AU
141.244.28.36	AS1117 Universitaet fur Bodenkultur, Wien	`1.81ms` from Vienna, AT
46.36.133.164	AS39824 JSC Alma Telecommunications	`0.60ms` from Almaty, KZ
23.109.62.180	AS7979 Servers.com, Inc.	`0.20ms` from Amsterdam, NL
134.164.197.164	AS6009 United States Department of Defense (DoD)	`0.60ms` from Atlanta, US
178.148.123.180	AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o.	`6.74ms` from Belgrade, RS
71.72.95.196	AS10796 Charter Communications Inc	`15.71ms` from Chicago, US
5.255.108.36	AS60404 The Infrastructure Group B.V.	`0.22ms` from Dronten, NL

Traceroute

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

traceroute -a -n -q1 -f5 61.203.241.197

traceroute to 61.203.241.197 (61.203.241.197): 64 hops max, 52 byte packets

5 [AS5580] 203.190.230.37 1.065 ms

6 [AS9824] 203.165.0.53 0.898 ms

7 *

8 *

9 *

10 [AS4721] 61.203.241.197 24.037 ms

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

On December 14th 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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