A while ago I move most of my domains from using the DNS servers of Godaddy to my own DNS servers. Every time I'd move a domain, Godaddy would drop it from their DNS server immediately but the world would pick up the change on latest.
Sometimes even more than 48 hours later.
More specifically, if I understand this correctly, what takes time is the update of all the global root servers that should know where is the DNS server of the domain.
As far as I understand there are two solutions to this:
Unfortunately Godaddy stopped supporting these. Luckily almost all of my domains are already using my own DNS servers.
Tools to check resolution (Global DNS propagation)
I found / was recommended two sites that can help me see how the rest of the world sees the DNS records of a particular domain:
dig is the ultimate Linux command line tool for DNS lookup
List all the name servers
$ dig +nocmd . NS +noall +answer +additional
I think I knew how to check what the root name servers think about the DNS server of a particular domain, but now I don't remember
$ dig @k.root-servers.net perlmaven.com NS +short +trace
Seems to work (checking the k root server), but I am not sure if that's the best way to do it.
And just in case I forget, this is how I can list the records of mail.perlmaven.com as known by ns.tracert.com
$ dig mail.perlmaven.com @ns.tracert.com
Published on 2013-07-11 by Gabor Szabo