Received a call from this telephone number. No message was left. I called the number back...adding the *67 prefix. I  reached a recording that said "Thank you for calling. Press '1' to be connected or press '9' to opt out".

ID said 'Cambridge MA' ~ picked up and he hung up.  Immediately got another call from same #, caller ID said 'Unknown' ~ I answered again and this time (live person) he said "I'm calling about real estate in your area" - another solicitor...and now blocked. 'Free Reverse Phone Look-up' online says call based in Belmont, MA. (I don't answer unknown calls ever but thought it was my mom's doctor.)