Codes used in several countries
BG on a licence plate
BG is an area code in 4 countries. The plate's style and country code tell them apart.
Austria
BG 123ABCode details →Federal Gendarmerie
No longer issued
Italy
BG A58322Code details →Bergamo (Lombardy), Lecco (Lombardy)
Serbia
BG 123-ABCode details →Belgrade (City of Belgrade)
named after Beograd
United Kingdom
BG51 ABCCode details →Birmingham