Caller ID says "MASSACHUSETTS" on the 9th of March.  Typically I see this caller ID associated with cell phones in the state.  Caller ID is "5089974125" instead of the default (xxx) xxx xxxx format on the 7th of March.  So they are trying to look vanilla, but have failed.  They leave no message.  Both days they call around 5PM.

I do not call them back.

I looked elsewhere as there was little here.  The phone number corresponds to a land line in New Bedford, MA.  Two sites list two different owners.  The number was listed as a medium spam level.  One report said that they hang up when you answer.  Another says they have a New York accent, ask for the homeowner, and swear at you when you ask questions.

Spoofing their caller ID, possibly calling from a run down part of the state, having an accent that doesn't match the town (more indication of a spoof), leaving no message, refusing to answer questions, swearing at you... this spells S-C-A-M.