In some cities, streets have been renamed and renumbered between the time your ancestor lived there and today. If your family lived in the same house from 1880 through 1930, make certain the address didn’t change during that time period. Chicago had major changes to addresses in 1909, and other cities did as well. A larger town may have absorbed all or parts of bordering suburbs or towns. Before you type that 1890 address into Google Maps or another modern map site, make certain the address hasn’t changed.