210.172.240.0/20

AS4721 · JCOM Co., Ltd.

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Summary

Country	Japan
Domain	jcom.co.jp
ASN	AS4721
Registry	JPNIC
ID	JCN-CIDR-BLK-JP

WHOIS Details

inetnum:        210.172.240.0 - 210.172.255.255
netname:        JCN-CIDR-BLK-JP
descr:          JCOM Co., Ltd.
remarks:        Email address for spam or abuse complaints : [email protected]
country:        JP
admin-c:        JP00006551
tech-c:         JP00006551
last-modified:  2021-09-27T23:53:50Z
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 are contained by 210.172.240.0/20

Range	ASN	Company	Num of IPs
210.172.240.0/21	AS4721	Jupiter Telecommunications Co., Ltd.	2,048

Nearby Ranges

BGP prefixes that overlap with 210.172.0.0/16

Range	ASN	Company	Num of IPs
210.172.64.0/18	AS2516	KDDI CORPORATION	16,384
210.172.0.0/19	AS9600	Sony Biz Networks Corporation	8,192
210.172.224.0/20	AS4680	Mitsubishi Electric Digital Innovation Corporation	4,096
210.172.240.0/21	AS4721	Jupiter Telecommunications Co., Ltd.	2,048

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

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

IP Address	ASN	Details
210.172.242.106	AS4721 JCOM Co., Ltd.	`9.79ms` from Tokyo, JP
210.172.241.62	AS4721 JCOM Co., Ltd.	`11.24ms` from Tokyo, JP
210.172.254.37	AS4721 JCOM Co., Ltd.	`11.68ms` from Tokyo, JP
210.172.244.1	AS4721 JCOM Co., Ltd.	`3.70ms` from Tokyo, JP
210.172.253.188	AS4721 JCOM Co., Ltd.	`11.20ms` from Tokyo, JP
210.172.243.56	AS4721 JCOM Co., Ltd.	`9.69ms` from Tokyo, JP
210.172.255.59	AS4721 JCOM Co., Ltd.	`12.53ms` from Tokyo, JP
210.172.252.1	AS4721 JCOM Co., Ltd.	`2.60ms` from Tokyo, JP
210.172.247.175	AS4721 JCOM Co., Ltd.	`12.43ms` from Tokyo, JP
210.172.240.1	AS4721 JCOM Co., Ltd.	`4.10ms` from Tokyo, JP
210.172.245.85	AS4721 JCOM Co., Ltd.	`12.90ms` from Tokyo, JP
210.172.246.22	AS4721 JCOM Co., Ltd.	`12.51ms` 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
37.97.254.4	AS20857 Signet B.V.	`0.45ms` from Amsterdam, NL
71.206.24.116	AS7922 Comcast Cable Communications, LLC	`6.13ms` from Ashburn, US
137.128.124.68	AS668 United States Department of Defense (DoD)	`4.24ms` from Chicago, US
193.164.228.52	AS13223 Council Of Europe	`3.41ms` from Frankfurt am Main, DE
178.192.162.180	AS3303 Swisscom (Switzerland) Ltd	`0.75ms` from Geneve, CH
79.32.202.84	AS3269 Telecom Italia S.p.A.	`6.64ms` from Milan, IT
63.151.33.20	AS209 CenturyLink Communications, LLC	`1.66ms` from Minneapolis, US
210.133.185.4	AS7676 TAM Co., Ltd.	`6.02ms` from Osaka, JP
34.141.246.116	AS396982 Google LLC	`0.11ms` from Oudeschip, NL
124.44.41.148	AS9595 NTT-ME Corporation	`6.11ms` from Tokyo, JP
73.108.134.52	AS7922 Comcast Cable Communications, LLC	`11.09ms` from Atlanta, US
110.231.142.84	AS4837 CHINA UNICOM China169 Backbone	`13.28ms` from Beijing, CN
144.208.228.52	AS42473 Anexia Cloud Solutions GmbH	`0.15ms` from Bratislava, SK
85.67.174.196	AS20845 DIGI Tavkozlesi es Szolgaltato Kft.	`1.14ms` from Budapest, HU
102.190.121.164	AS24835 Vodafone Data	`5.29ms` from Cairo, EG
209.97.249.132	AS26241 3z.net	`0.91ms` from Cincinnati, US
79.234.248.36	AS3320 Deutsche Telekom AG	`8.62ms` from Frankfurt am Main, DE
195.224.163.100	AS5413 Wavenet Limited	`0.54ms` from London, GB
87.221.30.84	AS12479 Orange Espagne SA	`1.40ms` from Madrid, ES
24.90.185.228	AS12271 Charter Communications Inc	`1.24ms` from New York City, US
179.172.254.132	AS26599 TELEFÔNICA BRASIL S.A	`9.04ms` from Novo Hamburgo, BR
79.252.171.100	AS3320 Deutsche Telekom AG	`5.77ms` from Nuernberg, DE
54.233.193.52	AS16509 Amazon.com, Inc.	`0.16ms` from Osasco, BR
176.169.169.148	AS5410 Bouygues Telecom SA	`4.45ms` from Paris, FR
170.106.177.164	AS132203 Tencent Building, Kejizhongyi Avenue	`0.25ms` from San Jose, US

Traceroute

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

traceroute -a -n -q1 210.172.245.40

traceroute to 210.172.245.40 (210.172.245.40): 64 hops max, 52 byte packets

1 [AS31898] 140.91.206.122 0.183 ms

2 [AS5580] 203.190.230.187 0.973 ms

3 [AS5580] 203.190.230.37 1.508 ms

4 [AS9824] 203.165.0.53 1.219 ms

5 *

6 *

7 *

8 [AS4721] 210.172.245.40 13.264 ms

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

On January 9th 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.

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