$ORIGIN 236.205.209.in-addr.arpa.
@ IN SOA ns1.corenoc.net. hostmaster.corenoc.net. (
                                6689
                                10800
                                3600
                                604800
                                86400
                                )
0/24      IN NS ns1.corenoc.net.
0/24      IN NS ns2.corenoc.net.

1        CNAME 1.0/24.236.205.209.in-addr.arpa.
2        CNAME 2.0/24.236.205.209.in-addr.arpa.
3        CNAME 3.0/24.236.205.209.in-addr.arpa.