California Charity Trust search shows UNION OF CONCERNED SCIENTISTS as registered using fundraiser / telefunders :
DONOR SERVICES GROUP, LLC
M & R STRATEGIC SERVICES, INC.
OMP, INC.
ARIA COMMUNICATIONS CORPORATION
ref: http://rct.doj.ca.gov/Verification/Web/Detail ... 92-c537fcab2366
https://www.sos.wa.gov/charities/search_detail.aspx?charity_id=4877
Demand placement on their internal do not call lists!
The Union of Concerned Scientists is a charitable organization which IS allowed to call you even if you're on the DNC list. Check your information on charitable and political organizations and you'll see that they can call you.