srv3.3net.pl has one IP number , which is the same as for 3net.pl. srv3.3net.pl also has a corresponding reverse pointer. cwo.pl, pbon.pl, edia.pl, 3net.pl, simm.pl and at least 96 other hosts point to the same IP. 3net.pl is a domain controlled by two nameservers at 3net.pl themselves. They are on different IP networks. Incoming mail for 3net.pl is handled by one mailserver also at 3net.pl. srv3.3net.pl is hosted on a server in Germany even though the hostname implies Poland.