Codes used in several countries
AO on a licence plate
AO is an area code in 5 countries. The plate's style and country code tell them apart.
Germany
AÖ-AB 1234Code details →Altötting (Bavaria)
Greece
AO-1234Code details →Achaea, Mount Athos
Italy
AO A58322Code details →Aosta (Aosta Valley)
Ukraine
AO 1234 BCCode details →Zakarpattia Oblast
No longer issued
United Kingdom
AO51 ABCCode details →Norwich (Anglia)
Germany
Greece
Italy
Ukraine
United Kingdom