however I do find 47921 and on the wikipedia page is says: 47921-47924
What do you think best? to add the four codes with place Rimini or add some other place names as well?
Wikipedia says
47922 Viserba, San Vito (it actually says 47822, but poste.it does not know this code)
47923 Vergiano
47924 Rivazzurra, Miramare