The caller is "The Share Group", a call center for multiple non-profit organizations. I did not answer these calls, but calling the number back, you get a recording explaining who they are, and that you are being called because you were identified as a past supporter of some group they call for. The recording offers the ability to remove your number from their calling list by pressing '2'.
I keep getting calls from 202-315-5364 which I do not answer, but when I call back the automated system does not give the option to have your number removed from their call list. You can NOT pus "2" as stated above. Your only option is to leave a message on their voice mail system....which I have not done.