Airplane "N Number" Markings. Most aircraft are required to have N numbers, or "markings," at least 12 inches high. Here is a summary of the rest of the required physical attributes of the markings, as well as a list of those aircraft exempt from the 12-inch requirement.What are the n numbers?
An N-number begins with a run of one or more numeric digits, may end with one or two alphabetic letters, may only consist of one to five characters in total, and must start with a digit other than zero. In addition, N-numbers may not contain the letters I or O, due to their similarities with the numerals 1 and 0.What is an aircraft registry?
AIRCRAFT (REGISTRATION) The U. S. Department of Transportation, Federal Aviation Administration (FAA), Civil Aviation Registry, has jurisdiction over registration of aircraft. This office is responsible for developing, maintaining, and operating national programs for the registration of United States civil aircraft and certification of airmen.What is an aircraft registration number?
In the United States, the registration number is commonly referred to as an N number, because all aircraft registered there have a number starting with the letter N. An alphanumeric system is used because of the large numbers of aircraft registered in the United States.