Codes used in several countries
RD on a licence plate
RD is an area code in 3 countries. The plate's style and country code tell them apart.
Germany
RD-AB 1234Code details →Rendsburg-Eckernförde (Schleswig-Holstein)
Norway
RD 12345Code details →Agder
named after Mandal
United Kingdom
RD51 ABCCode details →Reading
Germany
Norway
United Kingdom