The website DonaldTrump.Watch created a database of every single person who donated to the Donald Trump campaign, using publicly available information provided by the FEC. The creator of the site took this information, created a data table with the donor’s addresses, and plotted their information on an interactive map using software created by OpenStreetMap (and openly available to the public).
Visitors to the site can find the names and addresses of Trump donors within a searched zip code, under an individual’s last name, or from a number of other queries.
The owners of the database, who have not disclosed their identities (despite doxing thousands of donors) also own the domain racist.watch. That website resolves to DonaldTrump.watch once loaded. Very little information about the company can be found otherwise.