The same old "home energy audit" - they aren't selling anything so not subject to DNC list (so they say). As soon as I heard the robovoice I switched my fax machine to answer - hopefully that will get my number of their list!
Just received a call from 1-321-961-5231. They come up as "Unavailable" so that you can't see who they are calling you. Message is a telemarketing company for an in-home energy evaluation. The message never identifies who the caller is or company is.