DNS delegation of seznam.cz updated: May 18, 2013 6:21:25 AM
Delegation
step
query
auth
servers
1
seznam.cz.
.
(d,k,c,m,j,l,a,b,h,i,f,e,g).root-servers.net.
2
seznam.cz.
cz.
(f,c,d,a,b).ns.nic.cz.
3
seznam.cz.
seznam.cz.
(ns,ms).seznam.cz.
We pick d.root-servers.net, one of the 13 root servers (1), and ask it about seznam.cz and learn that cz is delegated to five name servers (2), so we ask f.ns.nic.cz where we learn that seznam.cz is delegated to two name servers, including ns.seznam.cz (3), so we ask that one and get the following answer:
Seznam.cz is a domain controlled by two domain name servers at seznam.cz themselves having a total of four IP numbers. Two of them are on the same IP network. Incoming mail for seznam.cz is handled by two mail servers also at seznam.cz having a total of four IP numbers. Some of them are on the same IP network. Seznam.cz has four IP numbers (2a02:598:1::3, 77.75.72.3, 77.75.76.3, 2a02:598:2::3). Two of them are on the same IP network.
All of the 13 domains that use the mail server mx2.seznam.cz use the two mail servers mx1 and mx2.seznam.cz together, hereafter referred to as "mail server group 1", (example: email.seznam.cz ).