Codes used in several countries
CAS on a licence plate
CAS is an area code in 2 countries. The plate's style and country code tell them apart.
Germany
CAS-AB 1234Code details →Recklinghausen (North Rhine-Westphalia)
named after Castrop-Rauxel
Spain
CAS-1234-ABCode details →Castellón (Valencian Community)
No longer issued
Germany
Spain