We pick f.root-servers.net, one of the 13 root servers (1), and ask it about acppharma.pl and learn that pl is delegated to eight name servers (2), so we ask g-dns.pl where we learn that acppharma.pl is delegated to three name servers, including ns2.ikp.pl (3), so we ask that one and get the following answer:
Acppharma.pl is a domain controlled by three domain name servers at ikp.pl having a total of five IP numbers. Two of them are on the same IP network. Incoming mail for acppharma.pl is handled by one mail server at acppharma.pl themselves.