All computers or servers on the Internet have an IP address. IP addresses are allocated to organisations in blocks of contiguous addresses, who then allocate ranges within their allocation to their customers.
You can perform a query known as "WHOIS" to identify which organisation an IP address is allocated to.
Use the IP WHOIS tool on Solid Tools for Developers to:
Enter an IPv4 or IPv6 address in the "IP address" field.
Optionally select a regional WHOIS server to send your query to.
The raw output from the WHOIS database will be displayed.
The following example shows a WHOIS lookup for 2a00:da00:1800:82ea::5 - the IPv6 address of the Solid Tools for Developers web application.
% This is the RIPE Database query service. % The objects are in RPSL format. % % The RIPE Database is subject to Terms and Conditions. % See http://www.ripe.net/db/support/db-terms-conditions.pdf % Note: this output has been filtered. % To receive output for a database update, use the "-B" flag. % Information related to '2a00:da00:1800::/43' % Abuse contact for '2a00:da00:1800::/43' is 'firstname.lastname@example.org' inet6num: 2a00:da00:1800::/43 netname: IONOS-UK-NGCS descr: IONOS UK Next Generation Cloud Server (NGCS) country: GB admin-c: FHUK-RIPE tech-c: FHUK-RIPE status: ALLOCATED-BY-LIR mnt-by: AS15418-MNT mnt-by: AS8560-MNT created: 2018-03-20T10:29:44Z last-modified: 2020-11-27T17:15:42Z source: RIPE role: Fasthosts Networks UK address: Fasthosts Internet Limited address: Discovery House address: 154 Southgate Street address: Gloucester, GL1 2EX phone: +44 1452 561874 abuse-mailbox: email@example.com nic-hdl: FHUK-RIPE remarks: ----------------------------------------------- remarks: Please report abuse to firstname.lastname@example.org remarks: Abuse reports via other channels may be ignored remarks: ----------------------------------------------- org: ORG-FHL1-RIPE admin-c: GD8691-RIPE admin-c: MM24449-RIPE tech-c: GD8691-RIPE tech-c: MM24449-RIPE mnt-by: AS15418-MNT mnt-by: AS8560-MNT created: 2015-02-26T14:57:35Z last-modified: 2019-01-28T10:09:16Z source: RIPE # Filtered % Information related to '2a00:da00::/32AS8560' route6: 2a00:da00::/32 descr: Fasthosts Internet ltd origin: AS8560 mnt-by: AS15418-MNT mnt-by: AS8560-MNT created: 2014-11-12T15:52:10Z last-modified: 2014-11-12T15:52:10Z source: RIPE % This query was served by the RIPE Database Query Service version 1.100 (ANGUS)
An IP address is a unique "address" for any device that is connected to a network.
IPv4 addresses are four groups of between 1 and 3 digits, separated by dots.
For example, the server that runs Solid Tools for Developers has the IPv4 address: 126.96.36.199
IPv6 addresses are longer than IPv4 and contain letters as well as numbers. IPv6 networks can accommodate a much larger number of devices than IPv4 networks and are growing in popularity.
For example, the server that runs Solid Tools for Developers has the IPv6 address: 2a00:da00:1800:148::1