Caller ID says "Ashburnham MA". They leave no message.
I call back after hours (using *67 to block my number). I hear the busy signal. The signal seems to change every minute or so. I suspect the busy signal is their outgoing message.
So spoofed caller ID and the inability to be called back. Smells like a SCAM.
Got a call and picked up because it was a local number. Caller had an indian accent, with call center noise in the background. Very polite though, asked for the person in charge of the electric bill. I asked what company was calling, he said 'Soren Energy' or that's what I understood. Told him I was not subscribed to that company and that he had a wrong number. He politely said good bye and hung up.
We got a call from this number today at 4:47 pm and didn't answer. The caller ID was ASHBURNHAM MA. It only rang twice, which wasn't sufficient to go to voicemail. When I called back (our number is hidden by default on outgoing calls), I heard a busy signal. Thanks to all who posted information about this number. It will be added to our call blocker.