this number calls me several times a day.  never leaves a message

Same here.  They call me almost every day and never leave a message.

I don't know if they are a telemarketer, a debt collector, or a scam artist yet.

My Google Voice account says they are calling from a mobile phone in Flagstaff, Arizona.

I don't know anyone who lives there.  So, I know they are not calling me as a friend.

Maybe a molester!

Calls me every day, all hours, even weekends. I have no idea who it is or what they want. I don't have any debt that would prompt such calls. Going to head over to donotcall.gov and file a complaint.

This is a company that is selling walk-in bathtubs. I have tried to call them back at the number and they will not answer.