It is definitely some sort of routing used by a company that operates payphones. My friend called from a payphone right around the corner (in St. Louis) and this number came up on caller i.d.
I got a call from this number today. I kept saying Hello, but all I heard was heavy breathing and lots of noise in background, just like a payphone on a busy intersection.
Got a call later, a friend tried to call from a pay phone. He could hear me, but I could not hear him. I guess a lot of pay phones from the US use this number to get cheaper rates on long distance.
Got this call on my cell as well yesterday at 12:53pm. Called back and got the same message. The way it works at pay phones here in Florida is that they are able to be called back and would not say disconnected. I don't know how it goes anywhere else, but not too many people have my cell phone number.