About the IP WHOIS Lookup tool

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 Cases

Use the IP WHOIS tool on Solid Tools for Developers to:

  • Identify which organisation is responsible for an IP address
  • Find out contacts to report abuse or technical problems with an IP address


Enter an IPv4 or IPv6 address in the "IP address" field.


The raw output from the WHOIS database will be displayed.

The following example shows a WHOIS lookup for 2a02:24e0:8:d063::10, an IPv6 address allocated to Memset - the company that hosts the server running Solid Tools for Developers.

% 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 '2a02:24e0:8::/48'

% Abuse contact for '2a02:24e0:8::/48' is 'abuse@memset.com'

inet6num:       2a02:24e0:8::/48
netname:        MEMSET-HOSTING-TV2-D
descr:          Memset Ltd TV2-D
country:        GB
admin-c:        MN5194-RIPE
tech-c:         MN5194-RIPE
status:         ASSIGNED
mnt-by:         MEMSET
created:        2012-06-19T15:25:34Z
last-modified:  2012-06-19T15:25:34Z
source:         RIPE

role:           MEMSET NOC
address:        Memset Ltd
address:        Building 87
address:        Dunsfold Park
address:        Stovolds Hill
address:        Cranleigh
address:        Surrey
address:        GU6 8TB
remarks:        ***************************************************
remarks:        *** SEND ALL ABUSE REPORTS TO abuse@memset.com  ***
remarks:        ***************************************************
abuse-mailbox:  abuse@memset.com
admin-c:        ACS80-RIPE
admin-c:        NCW2-RIPE
admin-c:        SML-RIPE
tech-c:         ACS80-RIPE
tech-c:         NCW2-RIPE
tech-c:         SML-RIPE
nic-hdl:        MN5194-RIPE
mnt-by:         MEMSET
created:        2010-09-27T16:26:05Z
last-modified:  2013-08-23T14:15:32Z
source:         RIPE # Filtered

% Information related to '2a02:24e0::/32AS50957'

route6:         2a02:24e0::/32
descr:          MEMSET IPv6
origin:         AS50957
mnt-by:         MEMSET
created:        2011-02-14T13:53:15Z
last-modified:  2011-02-14T13:53:15Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.90 (BLAARKOP)

What is an IP address?

An IP address is a unique "address" for any device that is connected to a network.

IP addresses currently come in two formats - known as IPv4 (the most common) and IPv6 (a newer standard for an ever-expanding Internet.)


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:


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: 2a02:24e0:8:ab84::3:2

Run the IP WHOIS Lookup tool