; start SOA
$TTL    2560
@       IN      SOA    ns1.example.org. hostmaster.example.org. 
                     2010092001         ; Serial
                          43200         ; Refresh
                           7200         ; Retry
                        1209600         ; Expire
                           2560 )       ; Negative Cache TTL

$TTL 86400

$INCLUDE /etc/bind/dnssec-keys/Kexample.org.+007+61008.key
$INCLUDE /etc/bind/dnssec-keys/Kexample.org.+007+15584.key

@       IN      NS       ns1.example.org.
        IN      NS       ns2.example.org.