I received a call also but did not answer.  He did say his name for the GV announcement but did not leave a message.  Google shows that it's a realtor ... Bill Vaughan.

Same thing this morning at 9:15am. It's a realtor in Mckinney TX calling from his cell phone:
http://www.findhomesindallas.com.

Just spoke with him. Polite man, he's a realtor from Keller Williams who is looking for people wanting to sell their homes in specific neighborhoods.