named-checkconf -z
zone localhost/IN: loaded serial 2
zone 127.in-addr.arpa/IN: loaded serial 1
zone 0.in-addr.arpa/IN: loaded serial 1
zone 255.in-addr.arpa/IN: loaded serial 1
/etc/bind/zones/superuser.ir.db:1: no TTL specified; using SOA MINTTL instead
zone superuser.ir/IN: loaded serial 2006081401
/etc/bind/zones/rev.231.162.178.in-addr.arpa:1: no TTL specified; using SOA MINTTL instead
zone 231.162.178.in-addr.arpa/IN: loaded serial 2006081401