We pick a.root-servers.net, one of the 13 root servers (1), and ask it about sotiko.pl and learn that pl is delegated to eight name servers (2), so we ask h-dns.pl where we learn that sotiko.pl is delegated to three name servers, including link.sotiko.pl (3), so we ask that one and get the following answer:
Sotiko.pl is a domain controlled by four domain name servers at sotiko.pl and 42.pl having a total of five IP numbers. Two of them are on the same IP network. Incoming mail for sotiko.pl is handled by one mail server at sotiko.pl themselves. Sotiko.pl has one IP number (91.199.22.117), but the reverse is link.sotiko.pl.
There are about seventy host names that point only to the IP number 91.199.22.117.
Ten of those use the two name servers fns1.42.pl and vico.goofi.pl together, hereafter referred to as "name server group 1", (example: rok.bielsko.pl ). Worth noting is that all of the domains that use name server group 1 point only to the IP number 91.199.22.117.