The Fleet Operations Center was a building operated by the United Earth Starfleet Command in the mid-22nd century and was later controlled by the United Federation of Planets until at least the late 23rd century. (ENT: "The Expanse", "Demons", "Terra Prime"; Star Trek VI: The Undiscovered Country) Located near Starfleet Headquarters in San Francisco, California, on Earth, the center oversaw Starfleet Operations.
In January of 2155, the Fleet Operations Center was the location of the various conferences held by the delegates of Earth and various other planets to discuss a possible Coalition of Planets. Various directories were placed throughout the area, listing the building's personnel and their offices. (ENT: "Demons", "Terra Prime")