Duct cleaning.

Sigh... illegal telemarketers again.  Caller ID says Bay Shore NY.

Caller from this number calls repeatedly - when you pick up, there is a moment of dead air and then the caller hangs up. Happens repeatedly, usually in the afternoon. More than likely, is some kind of robocall

Telemarketer thing. Very annoying.

Telemarketer. Long Shore NY. Selling home security systems. Pre-recorded, voice prompted type call.  I answered a few basic questions and then said "do not call" to which the robot said "ok".  Hopefully that works.  Irritating stuff!