61.205.0.0/20

AS17511 · OPTAGE Inc.

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Summary

Country	Japan
Domain	optage.co.jp
ASN	AS17511
Registry	JPNIC
ID	K-OPTICOM-CIDR-BLK-JP

WHOIS Details

inetnum:        61.205.0.0 - 61.205.15.255
netname:        K-Opticom-CIDR-BLK-JP
descr:          OPTAGE Inc.
remarks:        Email address for spam or abuse complaints : [email protected]
country:        JP
admin-c:        JP00014196
tech-c:         JP00014196
last-modified:  2019-09-19T04:06:29Z
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 61.205.0.0/16

Range	ASN	Company	Num of IPs
61.205.192.0/18	AS9595	NTT-ME Corporation	16,384
61.205.128.0/18	AS9617	JCOM Co., Ltd.	16,384
61.205.80.0/20	AS17511	OPTAGE Inc.	4,096
61.205.96.0/20	AS17511	OPTAGE Inc.	4,096
61.205.32.0/21	AS18144	Enecom,Inc.	2,048
61.205.60.0/22	AS10013	FreeBit Co., Ltd.	1,024
61.205.56.0/24	AS10013	trunc inc.	256
61.205.58.0/24	AS10013	FreeBit Co., Ltd.	256
61.205.57.0/24	AS10013	FreeBit Co., Ltd.	256
61.205.59.0/24	AS10013	trunk inc.	256

Hosted domains

There are 11 domain names hosted across 3 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
61.205.12.138	el-sup.com	9
61.205.12.156	kyouseipro.com	1
61.205.12.163	gigazine.asia	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

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

IP Address	ASN	Details
61.205.14.89	AS17511 OPTAGE Inc.	`1.09ms` from Osaka, JP
61.205.15.93	AS17511 OPTAGE Inc.	`0.92ms` from Osaka, JP
61.205.4.52	AS17511 OPTAGE Inc.	`28.62ms` from Osaka, JP
61.205.1.201	AS17511 OPTAGE Inc.	`23.34ms` from Osaka, JP
61.205.3.57	AS17511 OPTAGE Inc.	`20.34ms` from Osaka, JP
61.205.5.219	AS17511 OPTAGE Inc.	`16.20ms` from Osaka, JP
61.205.7.183	AS17511 OPTAGE Inc.	`15.30ms` from Osaka, JP
61.205.12.48	AS17511 OPTAGE Inc.	`1.41ms` from Osaka, JP
61.205.2.182	AS17511 OPTAGE Inc.	`20.04ms` from Osaka, JP
61.205.6.172	AS17511 OPTAGE Inc.	`17.02ms` from Osaka, JP
61.205.0.141	AS17511 OPTAGE Inc.	`21.14ms` 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
172.212.40.52	AS8075 Microsoft Corporation	`0.38ms` from Ashburn, US
204.155.97.100	AS53571 PRECISION CASTPARTS CORP	`6.03ms` from Dallas, US
119.91.244.132	AS45090 Shenzhen Tencent Computer Systems Company Limited	`4.05ms` from Guangzhou, CN
195.235.66.100	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.21ms` from Madrid, ES
141.98.215.52	AS206804 EstNOC OU	`0.02ms` from Manila, PH
91.193.78.4	AS42702 DonbassInformCommunicationService Ltd.	`18.48ms` from Moscow, RU
73.113.166.244	AS7922 Comcast Cable Communications, LLC	`13.26ms` from Murfreesboro, US
153.212.185.36	AS4713 NTT DOCOMO BUSINESS,Inc.	`11.27ms` from Osaka, JP
194.199.209.4	AS2200 Renater	`7.04ms` from Paris, FR
35.173.214.4	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
208.110.98.100	AS25668 Cipherkey Exchange Corp.	`0.72ms` from Vancouver, CA
182.126.16.132	AS4837 CHINA UNICOM China169 Backbone	`4.28ms` from Zhengzhou, CN
67.101.9.164	AS20115 Charter Communications LLC	`0.64ms` from Ashburn, US
59.88.203.196	AS9829 National Internet Backbone	`9.10ms` from Bengaluru, IN
24.34.209.164	AS7922 Comcast Cable Communications, LLC	`6.67ms` from Boston, US
8.243.8.52	AS3356 Level 3 Parent, LLC	`0.19ms` from Buenos Aires, AR
5.226.30.180	AS200845 AVATEL TELECOM, SA	`2.88ms` from Madrid, ES
90.1.0.100	AS3215 Orange S.A.	`9.69ms` from Marseille, FR
5.182.240.4	AS31034 Aruba S.p.A.	`0.49ms` from Rome, IT
123.206.105.212	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.35ms` from Shanghai, CN
125.196.226.164	AS2518 BIGLOBE Inc.	`4.87ms` from Tokyo, JP
203.165.182.196	AS9824 JCOM Co., Ltd.	`10.24ms` from Tokyo, JP
192.164.201.244	AS5403 APA-IT Informations Technologie G.m.b.H	`0.65ms` from Vienna, AT
185.82.63.36	AS31736 senseLAN GmbH	`5.73ms` from Zuerich, CH
212.86.114.4	AS211381 Podaon SIA	`0.45ms` from Amsterdam, NL

Traceroute

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

traceroute -a -n -q1 61.205.1.212

traceroute to 61.205.1.212 (61.205.1.212): 64 hops max, 52 byte packets

1 [AS15169] 142.251.60.112 31.776 ms

2 *

3 [AS17511] 61.205.118.21 39.938 ms

4 [AS17511] 203.140.81.214 43.343 ms

5 [AS17511] 61.205.127.246 41.139 ms

6 [AS17511] 121.83.171.52 40.958 ms

7 [AS17511] 61.205.1.212 200.23 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 6th 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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