Reverse Lookups with Forwarders

[Doug Barton]

It's not at all clear from your description what you're trying to 
accomplish. Particularly it's not clear what you seem to be trying to 
accomplish with the 2317 delegation for a /24 zone.

Can you describe what you're trying to do, and why? It may be easier to 
help you that way. Please use the actual zone(s) you're working with, as 
that will also make it easier.

Doug

https://dougbarton.us/DNS/bind-users-FAQ.html#RealNames