US passenger serials plates.autos

Maine · sequential passenger map

Maine license-plate format

Maine passenger plates often show four digits and two letters. In this atlas the pattern string uses A for a letter slot and 9 for a digit slot. Other characters are separators that appear on the metal but do not enlarge the combination space.

Pattern
9999 AA
Classes
2 letters + 4 digits
Alphabet size
26
Skipped letters
none modelled
Combination count
6,760,000
Model year
1999

How the map works

Each A slot independently takes one glyph from ABCDEFGHIJKLMNOPQRSTUVWXYZ. Each 9 slot takes 0–9. The product of those bases is 6,760,000 — the size of the sequential space taught here. Hyphens, spaces and dots in 9999 AA are display only.

Maine kept a short alphanumeric as the lobster/chickadee plates evolved. Two letters on the right are the series key.

Before this map, Maine used 12345 numeric and early chickadee issues. Optional graphics (universities, military, environmental) can look nothing like the sequential passenger die and are not counted in the 6,760,000 figure.

SPR 9932 is three letters and four digits — not Maine’s 9999 AA map.

Generated versus issued

A string that fits 9999 AA is in-class. It is not automatically an issued plate. Series can skip blocks, retire numbers, or reserve low digits. This essay never queries a motor-vehicle file. See also generated vs issued.

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