I do not answer calls from numbers I do not know. The caller ID showed as Reno NV plus the phone number. They left no message on my machine. I blocked my number and called them back to see what would happen. I get a message that says that I need to dial a 1 or a 0 before that number.
No clue what it's about but I will be adding it to my block list.
I've gotten two calls, no messages. I am guessing that this is a spoofed number. The NV 775-476 exchange is a land-line exchange in Sutcliffe, NV on the shores of delightful Pyramid Lake (NE of Reno; thanks, Google Maps!). This is -- if I remember correctly -- on Paiute Indian Reservation lands, although I doubt it's a Paiute boiler room. Rather, I think that 476 is an under-utilized exchange with a lot of free numbers in its block... numbers spoofed by evil scammers. They're blocked now. Had they but left a message, I might have called them back and said yes! Now, however, I'll never hear their offer. At least not from this number.