Called last night around 8:00PM and just now at 10:00AM. Both calls went unanswered, letting it go to the answering machine, and each time the local "If you'd like to make a call, please hang up and try your call again" automated operator was all that was on the message. Similarly, despite still being in the same area code as us, the Caller ID reports "Out of Area".
I suspect it's a mass-robo call, but no idea. If it calls again I'll pick it up. ;)