Suggestions for Contacting Property Owner

[Matthew Shaw]

Hey all. I've got some vacant land I am very interested in. It is in a developed area, was purchased when first subdivided in the 70's and has just sat there. I looked up the tax records and have mailed the owners property of record 2x. I also found a phone number online for the owner (who knows how accurate that is) and have left a voicemail.

My question is, any other suggestions on how to get ahold of them? I am going to have my letter translated into spanish, but any other suggestions would be super helpful.

Thanks in advance.