In March 1935, the prefix 'MAN' came into use, followed by up to three digits, and in April 1936 a further three-letter scheme was introduced, placing a serial letter before the 'MN' code (giving the range BMN-1 to YMN-999).
The Isle of Man uses retro-reflective number plates with black letters; on a white background on the front of the vehicle, and yellow on the rear.
Since 23 April 2004 plates may incorporate the Manx flag, bearing the triskelion symbol surrounded by a circle of six stars, representing the 6 sheadings and the international country identification code GBM (Great Britain and Northern Ireland – (Isle of) Man).
When the current 2001 scheme was adopted in Great Britain, the region code 'MN' (within the 'M' range for Manchester and Merseyside) was reserved as well as other combinations of MN.
The current valid list of number plate formats are: There are around 65,000 registered vehicles in the Isle of Man.