We pick b.root-servers.net, one of the 13 root servers (1), and ask it about ww.de and learn that de is delegated to six name servers (2), so we ask z.nic.de where we learn that ww.de is delegated to three name servers, including secns.hbv.de (3), so we ask that one and get the following answer:
The two mail servers mgw01 and mgw02.bauerverlag.de together
There are several hundred of domains that use mail server group 1.
A third of those use name server group 1 (example: tvmovie.eu, abo-shop.eu and 50jahrebravo.de ). Worth noting is that most of the domains that use name server group 1 use mail server group 1.
A third of them use name server group 2 (example: bravoo.de, sal-internet.com and pralineclub.com ). Worth noting is that half of the domains that use name server group 2 use mail server group 1.
The three name servers lamens, nextns and secns.hbv.de together
Most of the more than two hundred domains that use name server group 1 use mail server group 1 (example: closermagazine.de, closer.de and digitalmovers.de ). Worth noting is that a third of the domains that use mail server group 1 use name server group 1.
The four name servers lamens, megans, nextns and secns.hbv.de together
Half of the several hundred of domains that use name server group 2 use mail server group 1 (example: kddy.de, personalausweisnummerngenerator.de and praemien-paradies.com ). Worth noting is that a third of the domains that use mail server group 1 use name server group 2.
