We pick i.root-servers.net, one of the 13 root servers (1), and ask it about tele2.se and learn that se is delegated to nine name servers (2), so we ask f.ns.se where we learn that tele2.se is delegated to three name servers, including sunic.sunet.se (3), so we ask that one and get the following answer:
There are more than a thousands domains that only use the mail server mailgw.swip.net.
Six percent of those use name server group 2.
Six percent of them use name server group 3. Worth noting is that half of the domains that use name server group 3 use only the mail server mailgw.swip.net.
The two name servers kista and pitea.dns.swip.net together
Half of the about a hundred domains that use name server group 3 use only the mail server mailgw.swip.net (example: hjelmstad.se ). Worth noting is that three percent of the domains that only use the mail server mailgw.swip.net use name server group 3.
The two name servers pitea and wexio.dns.swip.net together
Half of the about a hundred domains that use name server group 7 use only the mail server mailgw.swip.net (example: orbit-satellit.se, copab.se and egm.se ). Worth noting is that three percent of the domains that only use the mail server mailgw.swip.net use name server group 7.
The two name servers pitea and ystad.dns.swip.net together
One quarter of the more than hundred domains that use name server group 4 use only the mail server mailgw.swip.net (example: epifysen.se, comtech.d.se and class400.se ). Worth noting is that three percent of the domains that only use the mail server mailgw.swip.net use name server group 4.
The two name servers malmoe and ystad.dns.swip.net together
A third of the more than hundred domains that use name server group 6 use only the mail server mailgw.swip.net (example: evarice.se, loan.se and akvaterra.se ). Worth noting is that three percent of the domains that only use the mail server mailgw.swip.net use name server group 6.
