Help, reverse resolve on classless subnet wackyness

[Jeremy Friesen]

This is probably a terrible newbie mistake, as I am in fact a terrible
newbie, but I couldn't find it in the FAQ, so here goes. I'm trying to run
my own DNS for a small (16 IPs) subnet. I've set up bind, and when used
localy, everything is find and dandy. 206.86.17.130 properly resolves to
"vega.epits.com".

The ISP has delegated reverse DNS to my server, yet when I try to reverse
DNS my address through an external name server, something frightening
happens: 206.86.17.130 resolves to "vega.epits.com.17.86.206.in-addr.arpa".

Is this my mistake? My ISP's? They don't know either. Here's the file involved:

---------------

17.86.206.in-addr.arpa. IN SOA ns1.epits.com. webmaster.epits.com. (
                                    1               ; Serial
                                    43200           ; Refresh after 12 hours
                                    3600            ; Retry after 1 hour
                                    604800          ; Expire after 1 week
                                    86400 )         ; Minimum TTL of 1 day

17.86.206.in-addr.arpa. IN NS ns1.epits.com.
17.86.206.in-addr.arpa. IN NS ns2.epits.com.

130.17.86.206.in-addr.arpa.     IN PTR vega.epits.com.
133.17.86.206.in-addr.arpa.     IN PTR rigel.epits.com.

-----------------

Thanks in advance,
     Jeremy