"Whois" is a tool on Unix and Linux servers that queries WHOIS servers for ownership of domains, IP addresses and networks.
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
Usage
Enter an IPv4 or IPv6 address in the "IP address" field.
Optionally select a regional WHOIS server to send your query to.
Results
The raw output from the WHOIS database will be displayed.
The following example shows a WHOIS lookup for 2a04:3541:1000:500:2077:59ff:feb7:367d - 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 https://docs.db.ripe.net/terms-conditions.html
% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.
% Information related to '2a04:3541:1000:500::/64'
% Abuse contact for '2a04:3541:1000:500::/64' is 'abuse@upcloud.com'
inet6num: 2a04:3541:1000:500::/64
netname: UPCLOUD-UK-LON1-IPV6-1
descr: UpCloud Cloud Servers
country: GB
admin-c: UPC-RIPE
tech-c: UPC-RIPE
status: ASSIGNED
mnt-by: MNT-UPCLOUD
created: 2015-11-25T18:48:21Z
last-modified: 2015-11-25T18:48:21Z
source: RIPE
role: UpCloud Ltd
address: Aleksanterinkatu 15 B
address: 00100 Helsinki
address: Finland
abuse-mailbox: abuse@upcloud.com
nic-hdl: UPC-RIPE
mnt-by: MNT-UPCLOUD
admin-c: JP1584-RIPE
created: 2013-05-14T13:13:07Z
last-modified: 2021-07-26T10:25:15Z
source: RIPE # Filtered
% Information related to '2a04:3541::/32AS202053'
route6: 2a04:3541::/32
descr: UPCLOUD-UK-LON1-IPV6
origin: AS202053
mnt-by: MNT-UPCLOUD
created: 2015-03-10T00:42:33Z
last-modified: 2015-04-14T08:52:37Z
source: RIPE
% This query was served by the RIPE Database Query Service version 1.122.1 (DEXTER)