When conducting operations within its own AOR US Fleet forces command is under the combatant command of?

When conducting operations within its own Area of Responsibility (AOR), U.S. Fleet Forces Command operates under the combatant command of U.S. Northern Command (NORTHCOM) or U.S. Southern Command (SOUTHCOM), depending on the specific AOR in question. These commands are responsible for ensuring the security and defense of the respective regions, coordinating military operations, and integrating joint forces to achieve strategic objectives.