VOIP - how to see which number is called

VOIP - how to see which number is called

"I want to use VOIP telephone, but want to have a few telephone numbers which will be answered by one person. Problem is I want to see to which number caller is calling.

For example:
I have a numbers X, Y and Z. Caller is calling on number X, so I want to see on my screen (or telephone screen) a name that I assigned to this number.
I just add that it can be up to 15-20 numbers."