I just got a call from them. When you call back the number, there's a recording with some British person's voice. Supposedly, you can be removed from the list by entering your phone number "after the beep," which I did. If it persists, just contact the Do Not Call registry.
I recieved a phone call from this number rang for a few seconds and I believe they hung up I know it is a Oklahoma City area # b/c my husbands family lives there very odd we all have gotten a call from this strang phone number!