Question and response
Question
dig ad. NS
Answer
ad. 86400 NS ad.ns.nic.es.
ad. 86400 NS ns3.nic.fr.
ad. 86400 NS anycast23.irondns.net.
ad. 86400 NS anycast9.irondns.net.
Authority
ad. 86400 SOA anycast9.irondns.net. dnsmaster.corenic.org. 2603140817 7200 7200 604800 7200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0