I just got a call from this number, asking for a person that doesn't live at this address. I think it must be a bill collector. The name was similar to the person (different last name, but same first unusual name) that used to have our number.
Got a call from this number today, also from other numbers like it. They are collecting money, probably purchased debt and trying to collect it, or some iteration of the above agreement. Easiest to ignore. They are not telemarketing.