This number keeps calling me

Nobody bothered to talk, and there were voices in the background like a telemarketer's boiler-room.

978-775-6361 is Express-Scripts. They handle distributing prescription medications to people. If you have Medicare, or Tricare, or some other health insurance, they are probably calling to tell you that they are mailing your prescriptions to you. It'll be an automated call that will ask you if this is the YourLastName residence, to which you say yes or no.

If you are not expecting any prescriptions or medications, then some old elderly person probably has input a wrong phone number on their account for their medications with their insurance, or pharmacy, or whomever, etc.

Express-Scripts automated call to the number on file regarding a prescription being mailed.

Notice by Express Scripts that your order is confirmed and an estimated ship date for your meds.