Codes used in several countries
HY on a licence plate
HY is an area code in 3 countries. The plate's style and country code tell them apart.
Germany
HY-AB 1234Code details →Bautzen (Saxony)
named after Hoyerswerda
Greece
HY-1234Code details →Phthiotis
United Kingdom
HY51 ABCCode details →Portsmouth (Hampshire and Dorset)