We pick l.root-servers.net, one of the 13 root servers (1), and ask it about tl and learn that tl is delegated to three name servers (2), so we ask tl3.dyntld.net and get the following answer:
Tl (the tld of Timor-Leste) is a domain controlled by six domain name servers at dyntld.net and nic.tl having a total of eight IP numbers. All eight of them are on different IP networks. We are missing the IP:s of one server: soa.nic.tl.