Well, whoever this person or company is they are extremely persistent. After doing the call reject for the first number, I got 3 calls from a full 10-digit number in my area code (303) yesterday. I answered the phone and got the same option: press 1 to be connected or 2 for a voice mail. I didn't do anything and just hung up. I googled the number and nothing came up. So I called the number back and got a disconnected number. I just added to my call reject listing.
I have always been extremely careful about handing out my cell number. I have a Google Voice number I use to sign up for stuff.