Se todas as entradas forem iguais, você provavelmente poderá usar um arquivo de zona com um $GENERATE
para todas as zonas.
named.conf:
zone "1.168.192.in-addr.arpa" IN { type master; file "for-internal-use-ptr.zone"; };
zone "2.168.192.in-addr.arpa" IN { type master; file "for-internal-use-ptr.zone"; };
...
for-internal-use-ptr.zone:
$TTL 1D
@ IN SOA ns.your-domain. root.ns.your-domain. (
1 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
IN NS ns1.your-domain.
IN NS ns2.your-domain.
$GENERATE 0-254 $ PTR for.internal.use.only.