N3904Y

1964 Cessna 210D

Fixed-wing, single engine · serial 21058404

Valid registration

Registered with the FAA until Jan 31, 2030.

Registered owner

Otto William R

Owner type: Individual
Location: Ontario, CA

Registered to an individual. The FAA lists people last name first. We show the city and state only; the full mailing address is in the FAA's own record.

Aircraft

Make and model: Cessna 210D
Year built: 1964
Serial number: 21058404
Type: Fixed-wing, single engine · Land
Engines: 1 × Piston · Cont Motor IO 520 SERIES · 285 hp
Seats: 4
Weight class: Up to 12,499 lb
Certification: Type certificated · Standard airworthiness (issued May 16, 1964)
Mode S code: A485C4 (the transponder's ICAO address, used by ADS-B flight trackers)
Registered since: Apr 20, 1982 · last FAA action Sep 30, 2023

What a Cessna 210 looks likePhoto of a Cessna 210, not this aircraft: Tomás Del Coro from Las Vegas, Nevada, USA, CC BY-SA 2.0, via Wikimedia Commons

Check the official record

This page mirrors the FAA's public registry file dated Oct 30, 2026. The FAA's own N-number inquiry is the official record, with the full owner address and documents.

Where is it now?

The registry doesn't show where an aircraft is flying. Flight trackers do, by tail number or Mode S code A485C4: FlightAware or ADS-B Exchange. Some owners block tracking through the FAA's privacy programs.

Something wrong?

Owners update their registration with the FAA Aircraft Registry; changes appear here the day after the FAA publishes them. Email admin@whoownsthisplane.com about how this site shows a record.