With Multiple Account Numbers How can we label incoming calls to identify the Call source on multiple devices?

With Multiple Account Numbers How can we label incoming calls to identify the Call source on multiple devices? We have a main line with several extensions connected to multiple devices. Is there any way to have all incoming calls identified by the call source or which extension is dialed? I.E incoming call may come from a similar source but ring several devices - yet we don't know what source or company the incoming call is for.