[mmarx]

> I don't think it is technically possible yet to filter out just the current ones, so instead Wikipedia is manually overriding the addresses from Wikidata.

Note that the historical ones are of “normal” rank, whereas the current ones have “preferred” rank. You can filter that when using the API, and when using the SPARQL endpoint, if you go for the “truthy triples” representation `wdt:P856` of the “official website” property, you will only get best-ran statements – in this case the preferred ones. If you want to be absolutely sure, you can go for the “reified triples” representation and query for statements that don't have any “end time” qualifiers.