Drone users are facing the possibility of fines up to $27,500 and even jail time if they have not registered their devices with the federal government.

The Federal Aviation Administration's Feb. 19 deadline for drone registrations, which was set in December, has now passed.

The agency says "failure to register an aircraft may result in regulatory and criminal sanctions."

"The FAA may assess civil penalties up to $27,500," the FAA said in a frequently asked questions post on its website. "Criminal penalties include fines of up to $250,000 and/or imprisonment for up to 3 years."

The FAA is imposing a $5 fee for registrations, over the objections of drone advocates, but the agency provided refunds to people who registered their drones within the first 30 days of the new requirement.

The agency said Monday that 368,472 drones were registered by midnight on Feb. 19, surpassing the number of airplanes that are on record with the federal government.  

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