This is Survey Sampling International who do market research and opinion polls for clients. They are not required to screen numbers against the DNC list before calling. However they are required to maintain their own internal DNC list and place numbers on it when requested. You can read a little about why they are calling and how to be placed on their DNC list here.
Call from an ESL person, taking a survey of our city government phone service, that it wasn't a 'sales call'. I informed them I wasn't interested in providing an evaluation of our secure phone system.
This is obviously a 'get information' call from some marketing firm of some kind, but just as obviously they aren't being up front about who they are or who they represent.
Don't give them the time of day.