Also got a call from this # on my private pre-paid cell while we were traveling.  Stopped ringing before I could get to it.  Don't have VM set up, so no msg possible, but the fact they didn't try again tells me it's likely spam even though I use docs in this area code.  Not expecting any calls from them.  Guessing its yet another tired 'buy solar panels over the phone' scam.  Will mark it as spam in my phone and report it to the feds.