$TTL 1D
@ IN SOA ns1.test.jp. root.test.co.jp. (
  2024090801    ; serial
          1D    ; refresh
          1H    ; retry
          1W    ; expire
     2000000 )  ; minimum

test.co.jp.         3600 IN NS   ns1.test.jp.
test.co.jp.         3600 IN NS   ns2.test.jp.
ns1.test.jp.        3600 IN A    172.18.1.16
ns2.test.jp.        3600 IN A    172.18.1.17

www                 3600 IN A    1.2.3.4