These five letters of the alphabet, as well as some others and combinations, are not allowed to be used
The design of vehicle registration plates in EU countries was standardized in 2000, and since then they have four digits and three consonants, preceded by a white letter on a blue flag to identify each country (E for España, in the case of Spain) .
In Spain, on September 18, 2000, a 1981 Mercedes-Benz 230 SL with a León license plate was the first to receive one of the new registration types: 0000-BBB. Normally, the sequence would have started with 0000-AAA, but the General Directorate of Traffic (DGT) road authority had decided not to use vowels or the letters Q, CH, LL and Ñ on the license plates. registration.
The reason? They wanted to avoid any unfortunate combinations of letters such as PIS (which means pee in English), ANO (anus), acronyms such as ONG (NGO) or PCE (Communist Party of Spain) and names such as EVA, ANE and ANA.
The letters O, Q, Ñ, CH and LL of the Spanish alphabet have also been excluded to avoid confusion: the Ñ with an N, for example, or the Q with the O.
The alphanumeric code has no specific meaning; the registration number is only a means of keeping an official record of the vehicle and its owner(s).