Back in the Fall of 2014, a little noticed contactual battle surfaced some significant security concerns with the management of the American telephone system. It involved the local-number-portability administrator (LNPA). The LNPA manages the Number Portability Administration Centers (NPACs), which route all calls and texts for the US and Canada. This is the system that allows, for example, me to transfer my mobile number from Verizon to AT&T, if I wish.
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Paul Rosenzweig Fri, Apr 29, 2016, 2:15 PM