DNS delegation of wikipedia.cz updated: May 24, 2013 12:14:33 AM
Delegation
step
query
auth
servers
1
wikipedia.cz.
.
(j,g,f,i,d,l,h,k,b,a,e,m,c).root-servers.net.
2
wikipedia.cz.
cz.
(f,c,b,a,d).ns.nic.cz.
3
wikipedia.cz.
wikipedia.cz.
(ns1,ns0,ns2).wikimedia.org.
We pick j.root-servers.net, one of the 13 root servers (1), and ask it about wikipedia.cz and learn that cz is delegated to five name servers (2), so we ask f.ns.nic.cz where we learn that wikipedia.cz is delegated to three name servers, including ns1.wikimedia.org (3), so we ask that one and get the following answer:
Wikipedia.cz is a domain controlled by three domain name servers at wikimedia.org. Two of them are on the same IP network. Incoming mail for wikipedia.cz is handled by two mail servers also at wikimedia.org having a total of three IP numbers. Two of them are on the same IP network. Wikipedia.cz has two IP numbers (2620:0:860:ed1a::1, 208.80.152.201). Both are on different IP networks.
One quarter of those point to the IP number 208.80.152.201. Worth noting is that two thirds of the host names that point to the IP number 208.80.152.201 use the mail server lists.wikimedia.org.