Hint

The 'hint' priority associates an extension with an Asterisk channel for the purpose of mapping the state of the channel to a state of the extension.

It is now possible to specify a pattern match as a hint. Once a phone subscribes to something that matches the pattern a hint will be created using the contents and variables evaluated.

exten => _7[56]XX,hint,SIP/${EXTEN}

exten => 701,hint,park:701@parkedcalls

I have not tried this but I'm guessing you could also use wildcard on parked calls as follows.

exten => _7[01]X,hint,park:${EXTEN}@parkedcalls