Since Simone made her post to help others, I don't think she'll mind me forwarding her comment along with my added endorsement; No sense ignoring these calls, they'll just call back. In fact I also got another call with the last 2 digits different. However, it turned out to be a good thing because it lead me to a do not call service. Just call 866-246-1796
, give them the caller's phone number to confirm it's on their list and the receiving phone number to add to the do not call list.