nanog mailing list archives

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


From: "John R. Levine" <johnl () iecc com>
Date: 13 Apr 2016 15:45:04 -0400

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?

Helpfully,
John


Current thread: