Yes. Check renumbering independently of renaming and verify the relevant period using dated local records; an unchanged street name does not guarantee unchanged building numbers.
Not necessarily. It may describe a delivery route rather than a specific modern street address.
Dated ordinances, conversion lists, maps, directories, and relevant local archival records can help establish the change.
No. Treat it as a lead and verify the historical identity through dated sources.
No. Publish only the location detail necessary for the account and consider the privacy of unrelated current occupants.