Called me around 8pm. Did not receive a Vmail. I called the number back and it is an emergency air company. Did not sign up for anything so it's just a random call/scam most likely. Don't answer the call.
Has called multiple times over the past two months or so. I never answer as I wait for a message to be left. Since no message is ever left, I added the number to my blocked numbers list. Problem solved.