There is always the old-fashioned way - - send a letter to the address - - but otherwise, in most states the county's tax assessor keeps public records, available to be viewed by all. David Brower has a good suggestion, since real-estate professionals have access to these records without the need to make a personal trip to the assessor's office . . . however, we also have an obligation to use the records ethically, hence we also wonder about the nature of your question.
Some states/counties probably have less regulation of public access than others...but a Google or four county's assessor will tell you!