They called my business number daily and hung up each time I answered.
I called them back, "Thank you for calling HBW Leads." Recording says they offer free, no obligation car insurance quotes, but if you stay on the line, you can say "Do not call" and your phone number. Supposedly this will stop the calls.
We'll see.
(Just for fun I called them about 8 times today, let their recording record about 30 seconds of silence, then hung up.)