db.20.172.in-addr.arpa.

$TTL 1800
@       IN      SOA     ns0.at.quakecon.org. domain.quakecon.org. (
                     2014071501         ; Serial
                           1200         ; Refresh
                            180         ; Retry
                        2419200         ; Expire
                          10800 )       ; Negative Cache TTL
;
        IN      NS      ns2.at.quakecon.org.
        IN      NS      ns3.at.quakecon.org.