Using the ADSBExchange site and switching to the IFR High/Low view will actually yield a lot of useful information. When aircraft are inbound from say, Gallup VOR, they are talking with Center controllers to start getting lower altitudes and sequencing to get into Phoenix. The little blue boxes that look like postage stamp edges will have the appropriate sector frequency that you could expect them to be on. In the instance of Gallup VOR, the closest frequency box is Zuni, 120.550 MHz.
Check the Albuquerque Center page here on RR (
www.radioreference.com/db/aid/2239) for the frequencies associated to each RCAG (Remote Center Air/Ground) station. I have not seen a recent sector map from the FAA to know exactly where the boundaries are to know exactly where a center controller will give a handoff frequency, but the IFR High/Low map should give a good idea.
As aircraft get closer to Phoenix, they get handed off to Phoenix Approach controllers that assign a frequency based on location and altitude, until they get cleared to land on a particular runway and handed off to the tower controllers. In addition to the frequency page here for Phoenix Sky Harbor, Airnav is a good source for knowing if an aircraft is coming in from such and such direction and a certain assigned altitude what frequency they can be on.
So, the short answer is, look for arrivals from the Northeast to be on the Zuni or Winslow frequencies, as they get closer and lower, look for them on the Globe 1 or 2 site then handed off to Phoenix Approach (freqs on RR or pulled from the Airnav PHX
www.airnav.com/airport/phx page for specific directions and altitudes), off to final approach, tower, ground and to the gate.
Sorry for the verbose explanation, but hopefully that helps.
