I Contacted the FBI this is a scam

I just got two missed calls from the number 314-627-6701. When I tried to call it back I got a recording saying that my call did not go through and to try the number again. I called operator assistance and they said more than likely it's from a payphone. Anybody know who it is or what business it's from?

Keeps calling my phone and hanging up.

Did not answer the phone.
My phone service says it's from missouri

I received a call from this number, but did not answer it. I called the number back from a land line and it said this number is for special offers from a subscriber service and did not recognize the number I called from. So then I decided to call back from my cell phone (the number the call came in on) and it said "all circuits are busy." Very strange.
- Cris