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 : abuse@optage.co.jp
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 12 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	fusenji.com	10
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

751 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.	`0.86ms` from Osaka, JP
61.205.0.56	AS17511 OPTAGE Inc.	`21.54ms` from Osaka, JP
61.205.5.157	AS17511 OPTAGE Inc.	`20.96ms` from Osaka, JP
61.205.3.57	AS17511 OPTAGE Inc.	`21.84ms` from Osaka, JP
61.205.6.69	AS17511 OPTAGE Inc.	`17.22ms` from Osaka, JP
61.205.1.219	AS17511 OPTAGE Inc.	`21.66ms` from Osaka, JP
61.205.15.9	AS17511 OPTAGE Inc.	`0.95ms` from Osaka, JP
61.205.2.225	AS17511 OPTAGE Inc.	`20.73ms` from Osaka, JP
61.205.4.62	AS17511 OPTAGE Inc.	`28.34ms` from Osaka, JP
61.205.7.183	AS17511 OPTAGE Inc.	`22.47ms` from Osaka, JP
61.205.12.37	AS17511 OPTAGE Inc.	`1.39ms` 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
217.61.123.20	AS31034 Aruba S.p.A.	`0.39ms` from Arezzo, IT
210.54.3.4	AS4648 Global-Gateway Internet	`0.36ms` from Auckland, NZ
146.88.56.36	AS132280 Symphony Communication (Thailand) PCL.	`0.66ms` from Bangkok, TH
186.115.63.132	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`11.33ms` from Bogota, CO
84.176.213.68	AS3320 Deutsche Telekom AG	`3.32ms` from Duesseldorf, DE
84.174.178.100	AS3320 Deutsche Telekom AG	`4.91ms` from Frankfurt am Main, DE
78.77.140.116	AS3301 Telia Company AB	`0.60ms` from Goeteborg, SE
78.180.100.148	AS9121 Turk Telekomunikasyon Anonim Sirketi	`2.23ms` from Istanbul, TR
94.192.171.84	AS5607 Sky UK Limited	`3.47ms` from London, GB
77.68.11.180	AS8560 IONOS SE	`0.69ms` from London, GB
194.140.78.164	AS8216 INDRA SISTEMAS, S.A.	`0.87ms` from Madrid, ES
64.131.31.100	AS15250 Metronet	`0.49ms` from Minneapolis, US
185.134.32.100	AS47989 Mosinfocom Llc	`1.55ms` from Moscow, RU
118.195.250.68	AS45090 Shenzhen Tencent Computer Systems Company Limited	`0.96ms` from Nanjing, CN
58.242.26.180	AS4837 CHINA UNICOM China169 Backbone	`10.08ms` from Nanjing, CN
3.167.73.228	AS16509 Amazon.com, Inc.	`0.44ms` from Reston, US
204.8.229.100	AS32890 Beehive Telephone Company, Inc.	`1.64ms` from Salt Lake City, US
97.210.88.36	AS6167 Verizon Business	`12.56ms` from Seattle, US
118.49.87.52	AS4766 Korea Telecom	`2.01ms` from Seoul, KR
221.156.221.148	AS4766 Korea Telecom	`5.40ms` from Seoul, KR
82.102.151.36	AS12400 Partner Communications Ltd.	`0.55ms` from Tel Aviv, IL
95.142.52.132	AS34215 @Inet Technology Consultancy B.V.	`0.94ms` from Amsterdam, NL
141.161.220.4	AS11318 Georgetown University	`2.50ms` from Ashburn, US
192.34.161.164	AS4922 Shenandoah Cable Television LLC	`10.51ms` from Ashburn, US
93.114.50.84	AS57392 ONLINESHOP SRL	`6.73ms` from Bucharest, RO

Traceroute

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

traceroute -a -n -q1 61.205.3.203

traceroute to 61.205.3.203 (61.205.3.203): 64 hops max, 52 byte packets

1 [AS398478] 38.6.224.62 59.625 ms

2 *

3 *

4 *

5 *

6 [AS17511] 60.56.20.189 68.008 ms

7 *

8 [AS17511] 61.205.127.246 54.036 ms

9 [AS17511] 121.83.171.52 54.967 ms

10 [AS17511] 61.205.3.203 226.386 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On November 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.

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