This thread is confusing. Are you talking over the air channels or local channels on satellite.
OTA is simply whatever channels are within range to be received with an antenna. There are multiple methods to get those to the TV or pass them through a dish receiver. Some LNBs on the dish itself have an OTA input but you will not find it on the tailgaters and similar auto aiming dishes. You would need to have a 1000.2 or 1000.4 standard residential dish.
Local channels are provided by Dish in "spot beams", essentially an oval geographical area on the face of the earth, look up spot beam maps. Once you travel outside the spot beam that encompasses say Buffalo NY, changing the service address will not get you the locals for Buffalo. If you are in the spot beam for say Atlanta, and change your address to Atlanta you'll get the locals on the Atlanta beam, not Buffalo NY which is impossible as the Buffalo channels are not transmitted on the transponder for the Atlanta spot beam.