[188738] in North American Network Operators' Group
Re: phone fun,
daemon@ATHENA.MIT.EDU (John Levine)
Wed Apr 13 17:47:37 2016
X-Original-To: nanog@nanog.org
Date: 13 Apr 2016 21:40:25 -0000
From: "John Levine" <johnl@iecc.com>
To: nanog@nanog.org
In-Reply-To: <alpine.BSF.2.20.1604131609560.65186@nog2.angryox.com>
Errors-To: nanog-bounces@nanog.org
> 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.
Right, like I said three messages ago but that some people seem to
have missed:
NANP geographical numbers can be located to a switch (give
or take number portability within a LATA),
> A phone number, like an IP address, can only imply a physical location. It
> is not a guarantee, and that hint can range from moderately accurate to
> wildly wrong.
Quite right. US mobile carriers let you take your phone number
anywhere in the country, so people do. There's also a fair amount of
VoIP where again the phone need not be anywhere near the switch -- I
have landline phone numbers in NYC, Santa Cruz, Monreal, and Cambridge
UK, and don't live in any of those places.
Bonus question: is there any way to find out whether and where a
number's been ported without spending telco level amounts of money?
Free would be nice.
R's,
John
