We pick g.root-servers.net, one of the 13 root servers (1), and ask it about athea.sk and learn that sk is delegated to seven name servers (2), so we ask sns-pb.isc.org where we learn that athea.sk is delegated to two name servers, including dns.domains.sk (3), so we ask that one and get the following answer:
Athea.sk is a domain controlled by two domain name servers at domains.sk having a total of three IP numbers. All three of them are on different IP networks. Incoming mail for athea.sk is handled by two mail servers also at domains.sk. Both are on different IP networks. Athea.sk has one IP number (80.82.157.7).
All of the several thousand of domains that use the primary name server dns.domains.sk use name server group 1 (example: mracek.sk, ip.sk and cevys.sk ). Worth noting is that two thirds of the domains that use name server group 1 use the primary name server dns.domains.sk.
The two mail servers omicron and sns.domains.sk together
There are more than two hundred domains that use the two mail servers omicron and sns.domains.sk together, hereafter referred to as "mail server group 1".
One quarter of them use the two mail servers sns and triton.domains.sk together, hereafter referred to as "mail server group 2", (example: loma.sk, discocasco.com and pizzabystrizza.sk ). Worth noting is that all of the domains that use mail server group 2 use name server group 1.
Twelve percent of them use the two mail servers andromeda and sns.domains.sk together, hereafter referred to as "mail server group 3", (example: e-inzercia.sk, brusatislove.sk and holandstina.cz ). Worth noting is that most of the domains that use mail server group 3 use name server group 1.
The IPv4 number 80.82.157.7 only
There are about eighty domains that only use the IPv4 number 80.82.157.7.
One quarter of those use mail server group 1 (example: pdawin.com, ovimex.sk and rczlatemoravce.sk ). Worth noting is that nine percent of the domains that use mail server group 1 use only the IPv4 number 80.82.157.7.
