We pick b.root-servers.net, one of the 13 root servers (1), and ask it about com.nl and learn that nl is delegated to eight name servers (2), so we ask ns2.dns.nl where we learn that com.nl is delegated to two name servers, including ns1.com.nl (3), so we ask that one and get the following answer:
One of them use only the mail server www.com.nl. Worth noting is that all of the domains that only use the mail server www.com.nl use name server group 1.
One of them point only to the IP number 159.253.3.3.
All of the one domains that only use the mail server www.com.nl use name server group 1. Worth noting is that one of the domains that use name server group 1 use only the mail server www.com.nl.
The IP number 89.30.146.2
All of the one host names that point to the IP number 89.30.146.2 point only to that ip number (example: ns2.com.nl ).
The IP number 83.98.157.101
All of the one host names that point to the IP number 83.98.157.101 point only to that ip number (example: ns1.com.nl ).