phone fun, was GeoIP database issues and the real world consequences

Jean-Francois Mezei jfmezei_nanog at
Wed Apr 13 20:34:39 UTC 2016

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 ?

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