AlloPass

Hello, about a month ago, I answered my landline phone that was ringing, and I came across a message that had already started, giving me numbers and letters; I just hung up. But yesterday I received my phone bill and they charged me $5 for an AlloPass (which matched the date and time of the call). Of course, no one in my house called, since my girlfriend was with me when the call came in, and I seriously doubt that my 7-month-old son could have done it. So my question is this: Is it possible for someone to have done it from the outside?