In controlled airspace, contact the affected air traffic services (ATS) unit at the emergency number on your flight authorization report.
See Also
What to Do When Your Neighbor Has a DroneCan DJI Disable A Stolen Drone? Your Guide To RecoveryWhat Should I do If my Drone Is Lost?In uncontrolled airspace, if your drone enters or is likely to enter into a control zone during ATS unit hours, contact the affected ATS unit.
If your drone enters or is likely to enter into Class F Special Use Restricted Airspace, Class E controlled airspace, or a Class E control zone after ATS unit hours, contact the appropriate emergency phone number for your Flight Information Region as listed here.
