We pick m.root-servers.net, one of the 13 root servers (1), and ask it about seciu.uy and learn that uy is delegated to six name servers (2), so we ask ns3.nic.mx where we learn that seciu.uy is delegated to two name servers, including tacuabe.rau.edu.uy (3), so we ask that one and get the following answer:
Two of them use only the mail server guahif.seciu.edu.uy. Worth noting is that all of the domains that only use the mail server guahif.seciu.edu.uy use name server group 2.
Two of them point only to the IP number 164.73.128.62.
The three name servers seciu.uy, ardilla.unesco.org.uy and castor.unesco.org.uy together
There are five domains that use name server group 1.
All of those point only to the IP number 164.73.248.3.