You would need to find first _why_ they have different numbers.
In AT, CS, SK, there are "conscription" numbers in addition to housenumbers,
which are described here:
https://wiki.openstreetmap.org/wiki/Key:addr:conscriptionnumber
(heavily used)
https://de.wikipedia.org/wiki/Konskriptionsnummer
https://cs.wikipedia.org/wiki/%C4%8C%C3%ADslo_popisn%C3%A9
https://sk.wikipedia.org/wiki/S%C3%BApisn%C3%A9_%C4%8D%C3%ADslo
On 19.03.2018 18:02, Martin Koppenhoefer wrote:
In the Italian city of Genoa there are housenumbers in black and in red, which are different
numbers. People have started mapping them with the postfix "rosso" (red in italian) but are now
wondering if there are other areas with similar objects and how these are tagged.
Example housenumber
https://www.openstreetmap.org/node/5479906188
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