Page "Vehicle registration plates of Spain" Paragraph 16

This system lasted until September 2000, by which time Madrid was again running out of registrations, its " counter " reaching series < tt > ZX </ tt >.

Barcelona reached series < tt > XG </ tt >, while the next province by registration volume, Valencia, was far behind at series < tt > HJ </ tt >.

The allowed combinations < tt > ZY </ tt > and < tt > ZZ </ tt > were therefore never issued in any province.