$TTL 21600
$ORIGIN example.net.
@       IN      SOA     ns0.example.net. hostmaster.example.net. (
                        2020010100  ; Serial #
                        3600        ; Refresh
                        900         ; Retry
                        2592000     ; Expire
                        3600 )      ; Negative Cache TTL

        IN      NS      ns0.example.net.
        IN      NS      ns1.example.net.

        IN      MX      10 mx0.example.net.
        IN      TXT     "v=spf1 mx -all"

ns0     IN      AAAA    2001:db8:0::5
        IN      A       198.51.100.5

ns1     IN      AAAA    2001:db8:1::5
        IN      A       198.51.100.5

mx0     IN      AAAA    2001:db8::2
        IN      A       192.0.2.2

www     IN      CNAME   srv0.example.net.
srv0    IN      AAAA    2001:db8::8
        IN      A       192.0.2.8