We pick f.root-servers.net, one of the 13 root servers (1), and ask it about static-81-7-90-146.zebra.lt and learn that lt is delegated to five name servers (2), so we ask d.tld.lt where we learn that zebra.lt is delegated to two name servers, including ns1.telecom.lt (3), so we ask that one and get the following answer: