For the last three days I've received mid-day phone calls from "500-8308" (8/6/14 at 10:41 AM, 8/7/14 at 2:40 PM and 8/8/14 at 11:46 AM). The area code does not come up on the Caller ID, which presumably is intended to make you think the call is local... in my case, area code 480. The caller ID name appears as "FINAL NOTICE". The first time I did not pick up and they did not leave a message. The second and third time I picked up, but said nothing. Both times the line was dead/quiet, then the call got disconnected. This smacks of SCAM.
Just got a call from this number. Did not answer, but my phone displayed NEW MESSAGE. Listen to the message and all it was, was background noise of people talking...then they hung up without leaving a message.