On 2016-04-13 16:18, Peter Beckman wrote:
And further to that, throw in Local Number Portability (LNP) and you really need to know the full number in order to know which switch the specific number is assigned to. Not all 408-921 prefixed numbers will go to that switch in West San Jose.
Is there the equivalent of BGP for number portability where every telco has the full table of who owns each prefix as well as individual routes for ported numbers ? Or is there a central database that is consulted before a dialed number starts to be connected so originating telco knows to send call ? Or does the originating telco route the call to the original onwer of the prefix and lets that original owner figure out how to terminate the call ?
From a long distance billing point of view, if Bell Canada connects to a number originally onwed by AT&T but ported to Verizon, with whom would Bell share long distance revenues ?