Wholesale Question -Tracking Down Owner

[Reuben Royal]

Ok so I found this property in my area where someone has just moved out of it. I noticed it driving by because the grass was starting to get somewhat tall. I asked the neighbors and nobody seems to know where the current owner has gone. I've managed to find the owner's name and number in the phone book, but that doesn't do me any good because it's the number to where he just moved from. How do I track down the owner to try and see if he is interested in selling?