Codes used in several countries
OA on a licence plate
OA is an area code in 4 countries. The plate's style and country code tell them apart.
Germany
OA-AB 1234Code details →Oberallgäu (Bavaria)
Greece
OA-1234Code details →Athens
Ukraine
OA 1234 BCCode details →Cherkasy Oblast
United Kingdom
OA51 ABCCode details →Oxford
Germany
Greece
Ukraine
United Kingdom