example.        86400   IN      NS      ns.example.
example.        86400   IN      SOA     ns.example. admin.example. 2018031900 1800 900 604800 86400
example.        86400   IN      ZONEMD  2018031900 1 1 8ee54f64ce0d57fd70e1a4811a9ca9e849e2e50cb5 (
                                                       98edf3ba9c2a58625335c1f966835f0d4338d9f78f
                                                       557227d63bf6 )
                                ZONEMD  2018031900 1 1 000000000000000000000000000000000000000000 (
                                                       000000000000000000000000000000000000000000
                                                       000000000000 )
ns.example.     3600    IN      A       127.0.0.1