No, they don't check. Why should they? They don't have to worry about penalties because no one listens long enough to identify the culprit except for those who are truly interested. These calls will never stop unless you talk to them for a moment or two. If they talk about "someone being in your vicinity" for general contracting type solicitations, just tell them you rent an apartment. You'd be surprised how fast you would come off those types of lists. If they want to sell you Google space or something, just tell them you are a retired senior and do not own a computer. Think outside the box and you can get rid of a large number of these calls. However, since robots and computers do the dialing, they are here to stay forever. The fact that the # indicates TN or CA or NY doesn't mean a thing. For the most part the voice is attached to a body sitting in a foreign office.
That is why I never registered my cell phone (which I had for over 10 years) with the do not call list. I believe that the scammers somehow obtain the DNCL and then use it to abuse those numbers.