asterisk users - Apr 2005 - using goto to do selective dialing

If I set up a context, which has lots of extensions eg

[ext-local]
exten => 3000,1,Dial(SIP/3000)
exten => 3001,1,Dial(SIP/3001)
........
.....
exten => 3999,1,Dial(SIP/3999)

(I know the syntax is wrong, and it probably is not the best way to achive it)

then in another context, I use a goto like so

[selected-3000-numbers]
exten => _32XX,1,Goto(ext-local,${EXTEN},1)
exten => _34XX,1,Goto(ext-local,${EXTEN},1)

Will this allow me to only dial (from a phone in
selected-3000-numbers) the numbers starting 32 and 34??

Also is my "goto" syntax right?

Thanks for your input
David