We pick d.root-servers.net, one of the 13 root servers (1), and ask it about cctld.nc and learn that nc is delegated to five name servers (2), so we ask any-ns1.nc and get the following answer:
Cctld.nc is a domain controlled by three domain name servers at ns2.nc, ns1.nc and any-ns1.nc having a total of four IP numbers. Two of them are on the same IP network. Incoming mail for cctld.nc is handled by one mail server at opt.nc. Cctld.nc has one IP number (202.87.129.60), but the reverse is ?.
Four of them use the name server ns2.nc. Worth noting is that four of the domains that use the name server ns2.nc point to the IP number 202.87.129.60.
Four of them use the name server ns1.nc. Worth noting is that four of the domains that use the name server ns1.nc point to the IP number 202.87.129.60.
There are six domains that use the name server ns2.nc.
Five of those use the three name servers any-ns1, ns1 and ns2.nc together.
Four of them point to the IP number 202.87.129.60. Worth noting is that four of the host names that point to the IP number 202.87.129.60 use the name server ns2.nc.