$ORIGIN test.com.
$TTL 604800
@ IN SOA ns1.test.com. root.test.com. (
  0000000006    ; serial
          1D    ; refresh
          1H    ; retry
          1W    ; expire
     2000000 )  ; minimum

                    IN NS   ns1.test.com.
                    IN NS   ns2.test.com.
ns1.test.com.       IN A    172.18.1.22
ns2.test.com.       IN A    172.18.1.23

www                 IN A    3.4.5.6