Hello there! Great news! You can definitely take a look at your call detail and find the number you're looking for. Via your My Verizon account: http://bit.ly/xB4iTc you have the capability of accessing your call detail for the past twelve months. All you need to do is go to your bills and view them in PDF format. From there you can scroll down to the call detail for each of your lines and see the calls you made and received.
~Ivone
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