Sounds like a robodialer and they are just trying to validate a number so they can sell it. They don't care who the number belongs to and the only thing they are selling is a valid number, which is verified as soon as you answer the phone.
Sounds like a robodialer and they are just trying to validate a number so they can sell it. They don't care who the number belongs to and the only thing they are selling is a valid number, which is verified as soon as you answer the phone.