[VoiceOps] historical information on ported numbers?

[Rob Verk]

I am hoping the group can help me out or point me in the right direction.  I need to get historical information on ported numbers.    If the number was ported to a mobile operator from a landline and if that number was ever ported back to a landline.    I believe iconectiv now manages this but I would like to go back to when number porting stated for mobile within the US.  I did find a handful of 3rd parties had this information, but I would like to license from the direct source if possible

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