133.237.0.0/16

AS23820 · Rakuten Group, Inc.

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Summary

Country	Japan
Domain	rakuten.co.jp
ASN	AS23820
Registry	JPNIC
ID	RAKUTEN-CIDR-BLK-JP

WHOIS Details

inetnum:        133.237.0.0 - 133.237.255.255
netname:        Rakuten-CIDR-BLK-JP
descr:          Rakuten Group, Inc.
remarks:        Email address for spam or abuse complaints : nic@mail.rakuten.com
country:        JP
admin-c:        JP00179607
tech-c:         JP00179607
last-modified:  2022-01-20T02:49:38Z
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

Hosted domains

There are 68 domain names hosted across 33 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
133.237.179.46	infoseek.co.jp	4
133.237.180.217	earnesteyes.com	3
133.237.180.61	95lqn.tk	2
133.237.180.159	rakuten.com.tw	2
133.237.94.141	rakuten-sqreem.co.jp	1
133.237.72.43	kdreams.co.jp	1
133.237.49.168	syf.jp	1
133.237.132.93	rakuten.jp	1
133.237.176.89	rakuten-toushin.co.jp	1
133.237.105.227	uhwbw.tk	1
133.237.179.23	spotlig.ht	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

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Pingable IPs

6,186 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
133.237.82.3	AS23820 Rakuten Group, Inc.	`1.87ms` from Osaka, JP
133.237.92.181	AS23820 Rakuten Group, Inc.	`2.61ms` from Osaka, JP
133.237.3.253	AS23820 Rakuten Group, Inc.	`1.95ms` from Tokyo, JP
133.237.6.254	AS23820 Rakuten Group, Inc.	`2.13ms` from Tokyo, JP
133.237.128.44	AS23820 Rakuten Group, Inc.	`1.20ms` from Tokyo, JP
133.237.57.239	AS23820 Rakuten Group, Inc.	`1.29ms` from Tokyo, JP
133.237.136.133	AS23820 Rakuten Group, Inc.	`1.32ms` from Tokyo, JP
133.237.62.138	AS23820 Rakuten Group, Inc.	`1.25ms` from Tokyo, JP
133.237.2.252	AS23820 Rakuten Group, Inc.	`1.99ms` from Tokyo, JP
133.237.132.89	AS23820 Rakuten Group, Inc.	`1.44ms` from Tokyo, JP
133.237.76.10	AS23820 Rakuten Group, Inc.	`1.46ms` from Tokyo, JP
133.237.94.118	AS23820 Rakuten Group, Inc.	`1.60ms` from Osaka, JP
133.237.40.129	AS23820 Rakuten Group, Inc.	`1.64ms` from Tokyo, JP
133.237.45.71	AS23820 Rakuten Group, Inc.	`1.36ms` from Tokyo, JP
133.237.134.8	AS23820 Rakuten Group, Inc.	`1.23ms` from Tokyo, JP
133.237.101.19	AS23820 Rakuten Group, Inc.	`1.44ms` from Tokyo, JP
133.237.93.4	AS23820 Rakuten Group, Inc.	`2.26ms` from Osaka, JP
133.237.17.20	AS23820 Rakuten Group, Inc.	`1.73ms` from Tokyo, JP
133.237.69.135	AS23820 Rakuten Group, Inc.	`1.22ms` from Tokyo, JP
133.237.7.188	AS23820 Rakuten Group, Inc.	`2.23ms` from Tokyo, JP
133.237.78.36	AS23820 Rakuten Group, Inc.	`2.10ms` from Tokyo, JP
133.237.58.15	AS23820 Rakuten Group, Inc.	`1.24ms` from Tokyo, JP
133.237.5.254	AS23820 Rakuten Group, Inc.	`1.66ms` from Tokyo, JP
133.237.9.42	AS23820 Rakuten Group, Inc.	`1.50ms` from Tokyo, JP
133.237.108.23	AS23820 Rakuten Group, Inc.	`1.20ms` 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
104.239.188.80	AS27357 Rackspace Hosting	`0.48ms` from Ashburn, US
73.81.25.192	AS7922 Comcast Cable Communications, LLC	`4.91ms` from Ashburn, US
57.154.226.64	AS8075 Microsoft Corporation	`0.89ms` from Ashburn, US
50.104.20.112	AS5650 Frontier Communications of America, Inc.	`12.09ms` from Chicago, US
109.138.200.64	AS5432 Proximus NV	`4.72ms` from Gravelines, FR
176.42.36.32	AS34984 Superonline Iletisim Hizmetleri A.S.	`2.76ms` from Izmir, TR
196.26.169.240	AS3741 Dimension Data	`0.76ms` from Johannesburg, ZA
213.18.176.64	AS56329 Gigaclear Limited	`1.58ms` from London, GB
20.207.162.32	AS8075 Microsoft Corporation	`0.76ms` from Mumbai, IN
112.84.228.192	AS4837 CHINA UNICOM China169 Backbone	`8.73ms` from Nanjing, CN
113.154.54.0	AS2516 KDDI CORPORATION	`14.15ms` from Osaka, JP
121.118.99.48	AS4713 NTT Communications Corporation	`14.89ms` from Osaka, JP
44.253.92.112	AS16509 Amazon.com, Inc.	`4.54ms` from Portland, US
198.204.209.160	AS27288 Digital Path	`18.20ms` from Redding, US
177.208.246.80	AS7738 V tal	`2.14ms` from Rio de Janeiro, BR
75.218.14.144	AS6167 Verizon Business	`6.63ms` from San Jose, US
59.120.45.192	AS3462 Data Communication Business Group	`0.81ms` from Taipei, TW
2.49.23.192	AS5384 Emirates Internet	`3.81ms` from Al Fujairah City, AE
172.205.217.192	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
198.176.112.0	AS400381 Centric Fiber Texas, LLC	`0.75ms` from Dallas, US
4.207.222.128	AS8075 Microsoft Corporation	`0.23ms` from Dublin, IE
164.90.234.208	AS14061 DigitalOcean, LLC	`0.23ms` from Frankfurt am Main, DE
20.153.158.0	AS8069 Microsoft Corporation	`0.22ms` from Gaevle, SE
14.176.25.16	AS45899 VNPT Corp	`2.99ms` from Hanoi, VN
88.44.90.144	AS3269 Telecom Italia S.p.A.	`11.26ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 -f5 -m9 133.237.120.71

traceroute to 133.237.120.71 (133.237.120.71): 9 hops max, 52 byte packets

5 [AS2914] 129.250.2.50 46.402 ms

6 [AS2914] 129.250.5.199 49.453 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On September 11th 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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