Been my experience that it doesn't work unless you call the Do Not Call number every 6 months or so. Got this call tonight on my cell phone which is also registered and I just ignored it.
Called both landline and cell phone, twice. Did not pick up and blocked call on landline. But these people have multiple numbers to circumvent blocks. Caller id just said "charlotte, nc".
I've received several calls from this number in the last 3 days. The caller ID says Duke Energy. They must be buying this list from someone, because they know your first name. I'm assuming it's the same anti-abortion group that's called other posters here, but I don't answer. If they're a scam, the FCC should investigate. However, if they're a legitimate charity, there's nothing we can do (other than block the number), because charities aren't subject to following the DNC. I would question, though, why any legitimate concern would spoof another company's phone number.