Codes used in several countries
FN on a licence plate
FN is an area code in 3 countries. The plate's style and country code tell them apart.
Germany
FN-AB 1234Code details →Bodenseekreis (Baden-Württemberg)
named after Friedrichshafen
Norway
FN 12345Code details →Østfold
named after Mysen
United Kingdom
FN51 ABCCode details →Nottingham (Forest and Fens)