Length, Format, and Quantity of all Aircraft Registration Numbers

Shown below are all N-number combinations & quantities:

5 digit Quantity
N12345 90,000
N1234A 216,000
N123AB 518,400
90% 824,400
4 digit Quantity
N1234 9,000
N123A 21,600
N12AB 51,840
9% 82,440
3 digit Quantity
N123 900
N12A 2,160
N1AB 5,184
0.9% 8,244
2 digit Quantity
N12 * 90
N1A 216
0.03% 306
1 digit Quantity
N1 * 9
0.001% 9

* N1 through N99 reserved for FAA use (not available to the public)

N-numbers can not start with zero, and can not contain letters i or o

Current Status of Entire FAA Database: Assigned, Held by FAA, Reserved, Available

915,399
Total N-number combinations (entire FAA inventory)
-327,814
U.S. registered aircraft with assigned N-numbers
-86,177

2,670   Held by FAA indefinitely, airport surface awareness system that tracks ground vehicles

50,432   Held by FAA indefinitely, SBS Program Office for the Privacy ICAO Address program (PIA)

33,075   Held by FAA in a five year Canceled/Not Assigned status, then returned to inventory

-49,398
Reserved by individuals, businesses, and manufacturers for future use, $10 annual renewal required
452,010
N-numbers currently available directly from FAA for $10 annual reservation
Updated December 2024
Array
(
    [total] => 915,399
    [assigned] => -327,814
    [airports] => 2,670
    [sbs] => 50,432
    [cancelled] => 33,075
    [reserved] => -49,398
    [available] => 452,010
    [mod] => 2024-12-07 12:01:07
    [date] => December 2024
)