I don't know but my dad answered the call and he said it was some septic system thing. We have signed up for the do not call list also.

This caller was offering a 30-day free trial of an industrial-strength bacteria-based septic system treatment product. When the trial period ends, he wanted me to pay $199 for a 5-year supply of this product. No thanks!

This phone number calls everyday.  They never leave a message, they call at all hours.  I have answered and no one says anything.

I get a call from this number every weekday, at all different times.  I never answer, and they never leave a message.