Codes used in several countries
OG on a licence plate
OG is an area code in 3 countries. The plate's style and country code tell them apart.
Croatia
OG 1234-ABCode details →Karlovac County
named after Ogulin
Germany
OG-AB 1234Code details →Ortenaukreis (Baden-Württemberg)
named after Offenburg
United Kingdom
OG51 ABCCode details →Oxford
Croatia
Germany
United Kingdom