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

John R. Levine johnl at
Wed Apr 13 19:45:04 UTC 2016

>> NANP geographical numbers can be located to a switch (give
>> or take number portability within a LATA), but non-geographic numbers
>> can really go anywhere.  On the third hand, it's still true that the
>> large majority of them are in the U.S.
> Would you agree that 408-921 is a geographic number?

No.  It's a prefix, assigned to the at&t switch in west San Jose.

> I guarantee you that there are phones within that prefix within 
> US/Calif/LATA-1 and also some well outside of that, probably not even in 
> the same country.

Who said anything about phones?  Could you describe what "geographic 
numbers can be located to a switch" means to you?


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