Kazachstan KZ 
DZ CD after a series of errors, AND return, E speciale, CZ speciale 
and more 
44 Länder diese Woche. Also -2. Kein MNE. Geholfen von schon gesehene AM,KSA etc.
Blue E is unknown to me. Does anyone know what it’s meant for?
From last summer spanish taxis and uber have a rear blue plate but at the front plate is normal (white).
Thank you for the explanation!
Yes, you are right. And the SP small plate means Public Service (Servicio Público), not any special plate.