Which ATC facility provides air traffic control services to aircraft on IFR flight plans during the en route phase of flight?

The Air Route Traffic Control Center (ARTCC) plays a crucial role in managing the safe and efficient flow of air traffic for aircraft operating under Instrument Flight Rules (IFR) during the en route phase of flight. This phase occurs once an aircraft has departed and is transitioning through various altitudes and airspaces on its path to its destination.

ARTCCs are responsible for providing air traffic control services over large geographical areas, typically encompassing multiple states. They manage high-altitude traffic, ensuring that aircraft maintain safe separation from one another as they navigate through crowded airspace. The use of advanced radar technology and communication systems allows controllers at ARTCCs to monitor and guide aircraft, providing them with essential information about their flight routes, weather conditions, and any necessary altitude adjustments.

In contrast, Terminal Radar Approach Control (TRACON) facilities manage traffic during the arrival and departure phases in the terminal airspace surrounding airports. Flight Service Stations (FSS) primarily provide weather briefings and flight planning assistance rather than direct air traffic control services. Control towers are present at airports to manage aircraft movements on the ground and during takeoff and landing, but they do not oversee en route operations. The distinction of responsibilities across these facilities highlights why the ARTCC is the correct