Caller ID states this number is from "Medical Help". And it is a cellular number from Monticello, Fl. If you know anything about Florida, you will know that Monticello is not exactly a center of commerce...But low lifes and thieves abound...
I use Mr. Number a lot, too. This is getting way too common. Lawlessness via the phone lines. I read one person to actually say he thought these creeps were actually getting the numbers FROM the DNC list. Easy to believe, actually.
If you're using a business phone, the Do Not Call Registry doesn't apply. The Do Not Call list is not there to protect anyone from unwanted callers. It is a list collected by the FTC and purchased by Legitimate and registered with the FTC Telemarketing companies, to limit the number of unwanted sales calls to those on the list. It is the honor system and has no mechanical function or anyway to protect anyone...at all. No monitoring, screening, or blocking. Scammers and scofflaws do not abide. It is just another law for them to break. Only the legitimate businesses will and do honor it.