$TTL 3D @ IN SOA ns1.data393.net. dns-admin.data393.net. ( 1998021912 ; Serial, todays date + todays serial 1H ; Refresh 2H ; Retry 4W ; Expire 1H) ; Minimum TTL IN NS ns1.data393.net. IN NS ns2.data393.net. 204.233.42.208.in-addr.arpa. IN PTR mail.hackdmz.net. 205.233.42.208.in-addr.arpa. IN PTR ns2.hackdmz.net.