Drone registration is off to an impressive start

More than 45,000 have registered

In less than two days, 45,000 people signed up to the US Federal Aviation Administration's (FAA) drone registration.

The drone registration went live only Monday, which requires anyone with a drone - or Unmanned Aircraft Systems (UAS) - weighing between 0.55 and 55 pounds.

It's an impressive number, considering those who already owned a drone before the registration went live on December 21 have until February 19 to register for a drone certificate.

But the FAA is anticipating a surge of registrations soon after the holidays, with the administration saying, "According to industry estimates, as many as 400,000 small UAS could be sold during the holidays."

The FAA will be temporarily taking the drone registration service offline tonight (as it did last night) for maintenance to prepare for the possible surge.

For those who do get a drone as a gift this holiday season (or anytime after December 21), you'll need to register before taking your drone up for its first flight.

Of course, if you don't register, you risk fines of up to $27,500, and possibly even prison time, according to the FAA.

Registration costs $5, though if you sign up for a certificate before January 21, the fee will be refunded.