This number is being used by Skype to relay calls made by Skype subscribers who paid to have also access to land lines.
Therefore if you receive a call from that number it could be anyone, including a friend of yours or a member of your familly using Skype to reach you. I just called my husband from South FL (using Skype) and this is the number that showed on our home phone in the Ottawa area.
This number is NOT a SOURCE number, it's a TRANSIT number : you can't conclude anything about who is the caller and what's his intent unless you answer.