We pick d.root-servers.net, one of the 13 root servers (1), and ask it about ns2.advancedtshirts.com and learn that com is delegated to 13 name servers (2), so we ask f.gtld-servers.net where we learn that advancedtshirts.com is delegated to two name servers, including ns1.advancedtshirts.com (3), so we ask that one and get the following answer:
Five of them point only to the IP number 142.4.16.193.
One of them point only to the IP number 142.4.25.42.
The IP number 142.4.16.193
There are six host names that point to the IP number 142.4.16.193.
All of those point only to that ip number (example: opentshirts.com ).
Five of them use name server group 1.
The two name servers ns1 and ns2.advancedtshirts.com together
There are eight domains that use name server group 1.
Five of those point only to the IP number 142.4.16.193. Worth noting is that five of the host names that point only to the IP number 142.4.16.193 use name server group 1.
Five of the six host names that point only to the IP number 142.4.16.193 use name server group 1. Worth noting is that five of the domains that use name server group 1 point only to the IP number 142.4.16.193.
The IP number 74.53.37.27
All of the two host names that point to the IP number 74.53.37.27 point only to that ip number.
The mail server advancedtshirts.advancedtshirts.com only
All of those use name server group 1. Worth noting is that one of the domains that use name server group 1 use only the mail server advancedtshirts.advancedtshirts.com.
All of them point only to the IP number 142.4.16.193.
The mail server advancedtshirts.advancedtshirts.com