I too am on the Do Not Call List and have received calls from this number (214-506-7289). My caller ID shows it is the American Heart Association. It is a computerized call and part of the AHA Dear Neighbor Campaign. I confirmed this by calling the AHA. I just assumed I was on their calling list due to my online registration for CPR courses. The AHA associate I spoke with advised that if one "makes a donation in lieu of flowers" that he or she will be on the call list for future donation campaigns. You can call the AHA and ask that they take you off their list.
As for being on the Do Not Call List, certain organizations are exempt, such as political and non-profit organizations. The main purpose of the Do Not Call List is to keep telemarketers and sellers from harassing you.