This is a known spammer by the name of Ryan Lenahan who's been busted for SMS spam by the FTC. He's now spamming using an autodialer to his stolen data/customer list.

Ryan's profile
https://www.facebook.com/ryan.lenahan.75
http://performinsider.com/2013/03/ryan-eagles ... d-bad-business/

Ryan uses spoofed caller id in the NPA|NXX of your local exchange to try to get you to pickup.

1/2 the time he uses his tools to simply verify your number is in service and live, the other half is for him to market spam to you.

Don't answer and file complaints with the FTC for his phone spam