I had a similar situation a couple years back-them calling from about 3 or 4 numbers daily. I rounded the numbers up and found someone in the local office who cared enough to help me and the next day the calls stopped.
Called today - 8/25/14 @ 2:43 pm. Left no message and I didn't think they would. If it is from where some people are saying, companies that are Non-profit can call and do not have to abide by the DNC list. I am sure they will keep calling and if I remember this number (as long as they use it again) I might pick up and tell them, I gave at the office, so goodbye.
It's my understanding the although not-for-profit and political solictators are not required to respect the federal dncl, they ARE required to add your number to their own internal do not call list if you tell tnem too.
calls daily from this number, caller id says ALA, could be american lung association, but than again with caller spoofing being so common I would be suspicious. If they want donations these days they need to ask me by mail. I will never donate by phone anymore because of all the scammers calling. I get more calls from scammers than I do from any others.