I'm guessing this is a solar panel scam because I've received such calls from several other numbers that were almost the same but with one digit changed, and all had a caller ID of "Auburn MA".
Saw the number on the box. Called it. No ring, sounded like a dead line, but after three calls I decided that this business somehow eliminated the "ringing" sound, or any other sound (busy, wrong number, unlisted, "we'll remove your number.."etc.) that one gets. Slick!!
Caller ID says "Auburn MA". They leave no message.
I call back after hours (using *67 to block my number). The message I hear is, "Press 9 to be put on the Do-Not-Call list." I never do this as it can actually make things worse.
So they have a spoofed caller ID with a message that doesn't identify themselves. This smells like a SCAM to me.