Jersey and MW had only been broken up for three weeks or so, right? It's possible that Jersey, who at one time lived (or flopped) right across the street, gave DB that number. Who knows why... perhaps if she ever needed any "odd jobs" done.
On the night of October 3rd, when she had an "odd" job (more like macabre and criminal), she dialed the number.
This was suggested to me recently: perhaps someone did answer, and DB asked for Jersey and of course he wasn't reachable. Or, no one answered because the call didn't connect. Then, DB took care of that job by herself. I'm still hung up on that though... because that means she would have left the house for some time, and that's huge risk with two sleeping children.
What about Dane in all this though? If someone 'answered', wouldn't that had to have been Dane? And then if that's true, then isn't Dane lying (not forthcoming) to the events that night? For what reason?