Got a call from this number on my home phone. Caller ID says "Fort Collins CO" which is roughly a local area call for me. I didn't answer. They left no message.
(FOP or someone claiming to represent them - I've had overly aggressive callers from FOP call before - makes me wonder if they were really approved reps)
See also http://800notes.com/Phone.aspx/1-303-974-4963
I don't know if the numbers belong to the same people or not. Neither of these numbers is shown on any CO FOP web page that I can see.
But I called them back (with caller id block on) and it sounds like the same automated system offering call list removal.
I only offered my number for removal a few days ago (at the above number), and they say it could take 30 days. It's less than that now, so we'll still have to wait and see.