$TTL 604800 @ SOA localhost. root.localhost. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; Public zone roots, mailhubs and non-CNAME services (use A) NS localhost. A 192.168.102.250 ; 62.243.165.95 * A 192.168.102.250 ; 62.243.165.95