mx4.catchservers.net has address 165.22.201.68
This page provides an online version of the OS hostname and whois commands. It allows you to retrieve publicly available DNS and Whois information for any website or hostname through a single interface.
Host Info
Whois info
cleantalk.org:~$ whois mx4.catchservers.net
% 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
%ERROR:101: no entries found
%
% No entries found in source RIPE.
% This query was served by the RIPE Database Query Service version 1.121.2 (ABERDEEN)