Whisper to callee based on DID called

Hi all

Right now, I use a televantage system, if someone calls a specific number, I can have it play an audio file to the callee based on who the company is they should answer the phone is. This is based on the number the caller called

In Asterisk, how can I pull this off. I’m at a loss on how I can get this working cleanly for my users

Regards

James