Who called from 9789048327

Missed the call - no message left. Since 978 is my area code I called it back - recording said Press 1 to be placed on the Do No Call list.

Sorry, Press 9 for the Do Not Call list.
I pressed 9 - said thank you and could take 72 hours.
Still not sure what this was for...or if I'm on another list now!

SCAM Free solar panels. Starts with a woman's robo voice, asks for homeowner, then says press 9 if you are interested in free solar panels, etc. Who starts a call without saying the company name and what it is about.