$ORIGIN 0.168.192.in-addr.arpa.
$TTL 7200       ; 2 hours
@               IN      SOA             @     root.st0.c304 (
                        9001 ; serial
                        3600 ; refresh (1 hour)
                        1800 ; retry (30 minutes)
                        1209900 ; expire (2 weeks)
                        86400 ; default_ttl (1 day)
                        )

;serverele DNS
@	IN	NS	_NumeServer1_fqdn
@	IN	NS	_NumeServer2_fqdn

;adresele ip, doar ultimul octet pentru retele /24
_adrIp	IN	PTR     _NumeHost_fqdn

;DE EXEMPLU:
1	IN	PTR	ns1.st0.c304.