[lug] Reverse domain registry question

[Chip Atkinson]

Greetings,

I'm setting up a few domains and am trying to get reverse lookups working.
I have the static IPs and both forward and reverse lookups work on the 
local box with the name server, but only forward lookups work in the
outside world.  How do I get the inaddr.arpa domain information to the
outside world?  Is this something that my ISP needs to do?  If so, how is
it done?  I have US Wurst as an ISP so I need to understand it so I can
explain it to them :-)

Thanks for any help
Chip