Same here.  It's "gateway communications" calling on behalf of a charity that you've donated to in the past.  So they say.  They're likely using the charity claim to get past the DNC list.

Call the number back and Press 2 to get added to the Do not call list.  Press 2 again to confirm.  And done!

Called, no message.  5:23pm MT 5/18/17

Just called our land line. No message.