It is called spoofing.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
I know how annoying those calls are, Brian42 and eventually, we will be able to stop spoofers. These are criminals that use a scrambler for their signals to see if anyone answers. If you don't, they won't leave a message and will move to the next number. For more information about spoofing, please check out this link. Please see #10 and 11: http://spr.ly/6600EtLHr.
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If my response answered your question please click the _Correct Answer_ button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!