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IP data

IP address133.237.16.234
Reverse DNS hostname
Hosting ProviderRakuten Group, Inc.

IP Geolocation

Geolocation resultsIP2Location LITEDB-IP LiteMaxMind GeoLite2
Postal code214-0021154-8501
Coordinates35.6895, 139.691735.6916, 139.768035.6435, 139.6816

IP whois

Network Range133.237.0.0/16
Administrative Contact
Technical Contact
Network Group, Rakuten Group, Inc., 050-5817-1146, email
Assigned Date27 Mar 2013 (9 years and 10 months ago)
Last Update7 Oct 2021, 05:56:02 (1 year and 3 months ago)
Parent Network
Network Range133.237.0.0 -
Network NameRakuten-CIDR-BLK-JP
DescriptionRakuten Group, Inc.
RemarksEmail address for spam or abuse complaints : nic@mail.rakuten.com
This information has been partially mirrored by APNIC from
JPNIC. To obtain more specific information, please use the
JPNIC WHOIS Gateway at
http://www.nic.ad.jp/en/db/whois/en-gateway.html or
whois.nic.ad.jp for WHOIS client. (The WHOIS client
defaults to Japanese output, use the /e switch for English
Last Modified20 Jan 2022, 02:49:38 (1 year ago)
Parent Network
Network Range133.0.0.0 -
DescriptionJapan Network Information Center
Admin Contact
Technical Contact
Japan Network Information Center, Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda, Chiyoda-ku, Tokyo 101-0047, Japan, +81-3-5297-2311, email
Abuse ContactABUSE JPNICJP, Urbannet-Kanda Bldg 4F, 3-6-2 Uchi-Kanda, Chiyoda-ku, Tokyo 101-0047, Japan, ZZ, +81-3-5297-2311, email, email //Generated from irt object IRT-JPNIC-JP
Remarks133/8 block is an ERX range which transfered from
ARIN to APNIC on 2009-10-30
The original allocation date was 1997-03-01
Please search whois.nic.ad.jp for more information
about this range
% whois -h whois.nic.ad.jp ***.***.***.***/e
Last Modified1 Nov 2022, 04:33:10 (3 months and 2 days ago)
Parent Network
Network Range133.0.0.0 -
Network NameJAPAN-INET
OrganizationAsia Pacific Network Information Centre
AddressPO Box 3646, South Brisbane, Queensland, 4101, Australia
Registered1 Mar 1997 (25 years and 11 months ago)
Updated1 Feb 2018 (5 years ago)
CommentIP addresses in this range were part of the ERX (Early Registration
Transfer) project. The registrations are now being maintained
by various registries, and the in-addr.arpa delegations are
being maintained by APNIC.
More specific IP address ranges from this ERX block have been
transferred to the appropriate RIR database. Please search for
a more specific IP address range to verify the current registrant.
APNIC is the Regional Internet Registry for the Asia Pacific region.
APNIC does not operate networks using this IP address range and
is not able to investigate spam or abuse reports relating to these
addresses. For more help, refer to:
Technical contact
Abuse contact
APNIC Whois Contact, +61 7 3858 3188, email

Autonomous System

OrganizationRakuten Group, Inc.
Administrative Contact
Technical Contact
Network Group, Rakuten Group, Inc., 050-5817-1146, email
Assigned Date23 Jul 2004 (18 years and 6 months ago)
Last Update18 Feb 2022, 04:59:02 (11 months and 16 days ago)


BGP prefix   whois
Prefix registryAPNIC
Prefix countryJapan
Allocation date1997-03-01 (25 years and 11 months ago)

Websites on this IP (1)

IP formats

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Useful resources

What is IP Address Lookup?

IP Address Lookup is a free online tool that reports detailed information about an IP address, including reverse DNS hostname, organization, ASN and IP whois.

It supports both IPv4 and IPv6 address types. You can enter a hostname as well. In this case, the IP address returned by the DNS lookup will be used.

It is also able to find the geolocation of an IP address and show its location on the map. Geolocation includes continent, country, region and city as well as the geographical coordinates (latitude and longitude).

The tool also represents the IP address in different formats: as IPv4, in decimal format and as compressed IPv6.

How it is different from others?

Read about the benefits of our tool here: 7 Reasons Why You Should Choose Our IP Address Lookup Tool.

What is Reverse DNS?

Reverse DNS lookup or reverse DNS resolution (rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address. The Reverse DNS Hostname is resolved by querying the DNS server for a pointer (PTR) record. Often used in anti-spam filters.

What is IP Geolocation?

IP-based geolocation is the process of identifying the geographical location of an internet-connected device by its IP address. For better accuracy, we use several IP geolocation databases (IP2Location LITE, DB-IP Lite and MaxMind GeoLite2) and choose the most appropriate result.

What is an IP whois?

WHOIS is a public directory where you can look up "who is" responsible for a domain or IP address. The IP address whois response shows which organization is holding which IP address blocks and their details.

What is an Autonomous System (AS)?

Autonomous System (AS) is a large network or multiple networks with a single routing policy. Basically, it is a collection of IP routing prefixes that allow Internet connected systems to communicate with each other.

What is an ASN?

In order for multiple autonomous systems to interact, each needs to have a unique identifier. An autonomous system number (ASN) is such a unique number used to identify a network on the Internet. AS numbers are assigned in blocks by Internet Assigned Numbers Authority (IANA). As of December 2020, the number of allocated ASNs exceeded 99,000.

What is a BGP prefix?

A BGP prefix is a network address written in CIDR notation (IP address followed by a slash and the bit-length of the subnet mask, for example:, which is advertised via Border Gateway protocol (BGP) and is associated with specific BGP attributes including origin, AS-Path and other information. The primary function of BGP protocol is to exchange routing and reachability information among autonomous systems (AS) on the Internet.

What is a NOC?

NOC stands for Network Operations Center and it is one or more locations from which technicians perform network monitoring or network management tasks.

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