4-1-1 Air Route Traffic Control Centers
AIM Chapter 4. Air Traffic Control — Section 4-1, Services Available to Pilots
Official text — AIM 4-1-1
AIM — FAA OPERATIONAL GUIDANCECenters are established primarily to provide air traffic service to aircraft operating on IFR flight plans within controlled airspace, and principally during the en route phase of flight.
Reproduced from the FAA Aeronautical Information Manual (Basic (with Change 3)). The AIM is FAA guidance, not regulation. Verify against the official source before relying on it operationally.
Is this a regulation?
No — this is FAA guidance, not a regulation.
Aeronautical Information Manual. FAA operational guidance and recommended practices. The AIM is not regulatory, although it often explains how to comply with regulations.