$TTL 38400
@        IN      SOA     serverdb.w3sistemas.com.br. hostmaster.w3sistemas.com.br. (
                         2010110620      ; Serial (yymmddxx)
                         10800           ; Refresh 3 hours
                         900             ; Retry 15 minutes
                         36000           ; Expire  10 hours
                         86400 )         ; Minimum TTL 24 hours

         IN      NS      ns1
         IN      NS      ns2
         IN      NS      ns3
         IN      NS      serverdb

         IN      MX      5       serverdb

         IN      A       XXX.XXX.XXX.XXX
ns1      IN      A       XXX.XXX.XXX.XXX
ns2      IN      A       XXX.XXX.XXX.XXX
ns3      IN      A       XXX.XXX.XXX.XXX
serverdb IN      A       XXX.XXX.XXX.XXX
www      IN      CNAME   w3sistemas.com.br.