Zonefiles & CIDR

[Stephen Ward]

Just a quick silly question.

Running BIND9 (someone kindly raped to get it to work on windows) but it 
does not seem to support CIDR ranges. I mostly use it to block unwanted 
email by connecting IP (glorified reverse DNS).

Rather than have to enter loads of lines to match up wide spans of ranges 
I would like to define them using CIDR, but it seems it does not support 
it.

I'm probably being really thick - but is this so?!