http://www.whois.com/whois/google.ie
shows
status: Active nserver: ns1.google.com nserver: ns2.google.com nserver: ns3.google.com source: IEDR
Domaintools.com shows something else
http://whois.domaintools.com/google.ie
Something else that's worth a look at: http://host.robtex.com/ns1.farahatz.net.html#graph