It called my work phone, so it's recorded into my Outlook email. I called the number and got a disconnecting message. Like you, I wondered how would a disconnecting number called?
I received a call from this number. It was in Spanish. In Spanish it said "This is your bank, we would like to reward you for using your account properly, please dial 1 for more info. I dialed 1 but the call dropped. I called the # and it was disconnected. It freaked me out so I checked my bank accounts but all is well..