Dylan Smith wrote:

US
plane registrations are colloquially known as 'N numbers' because they are
predominantly numbers. Many are exclusively numbers.

But not all. People still call their plane registration 'their N-number'
when it's something like N23AD even though the last two characters are
letters.

N-numbers, tail numbers, or (for cars) license plate numbers. For that
matter, driver's license number. It seems that most identification
codes, whether they be purely numeric or alphanumeric are referred to as
"numbers". Therefore, letters are numbers when they are part of an
identification code, et al.


-m
--
## Mark T. Dame
## VP, Product Development
## MFM Software, Inc. (http://www.mfm.com/)
"An overpowering need for something is the maternal progenitor
of a discovery of new ideas."