The assumed use of a DID (because you are paying extra, for a range of numbers)is that you are going to send the caller to a specific extension/Fax machine, etc.
Calls to the Digital assistant, a "real" receptionist, call queue or a Ring group, generally use the "main" number of a hunt group, something that internal callers would generally not be expected to be dialling.
Still, any of those destinations could be routed through a dummy extension.
You might have to provide more details on what you are trying to achieve.