They called and left no message. Caller ID says "Chattanooga TN". I called after hours (using *67 to block my number). Their recorded message identifies them as "a national marketing research firm" and claims that they are looking to ask about a product or service and that they do not intend to attempt to sell me anything. There is no option to be placed on a Do Not Call list (I wouldn't do it anyway as it can make things worse).
Other posts for this number have claimed that this is Wilkins Research Group (a survey company) with an office in Chattanooga (assuming it is them, the caller ID is still spoofed), The outgoing message identifies them as such a group, but does not give a company name (again suspicious). If this is actually WRG, I'd strongly suggest putting your company name on your message and not spoofing your caller ID.
Possibly related: I received another call, (978) 496-8498, about 40 minutes earlier that claims to be a republican survey. I'm reasonably certain that this earlier call is a scam. Are the two calls from the same people?