[asterisk-users] Mobile Number to Mobile carrier mapping

[Ritesh Agrawal]

Hi Alex,
This is a nice summary. Thanks a lot for your response.
My mere interest was to find out
(1) if a number is a mobile number
(2) If #1 is true, then if I had the carrier name, I could generate an SMS
to the US phone number without asking for the carrier info.

Ritesh


On 5/19/07, Alex Balashov <abalashov at evaristesys.com> wrote:
>
> On Wed, 9 May 2007, Ritesh Agrawal said something to this effect:
>
> > Is there a way to find out the mobile/landline carrier name based on the
> > phone number?
>
>    Ordinary people can only find this out if the NPA-NXX (area code +
> exchange, i.e. the first six digits) block to which the number belongs
> is assigned or delegated to a particular mobile carrier.  So, what you'd
> really be looking up is a particular NPA-NXX block's registered ownership.
>
>    There are many ways to get this information.  You can go to
> localcallingguide.com and do an "Area Code/Prefix/OCN" search.  There's
> also telcodata.us, and I imagine some others.  Or you can download the
> NXX block assignment spreadsheet straight from NANPA's web site.  This
> type of CO information is public and relatively ubiquitous, if you know
> where to look.
>
>    One caveat is that this information can be somewhat out of date or
> inaccurate, especially in 10000-blocks that have subdelegations across
> carriers.
>
>    The other is that this will not properly identify a phone number's
> origin
> for you if it's been ported away from the block-owning carrier under the
> Local Number Portability regime, to someone else in the LATA.  This trend
> has become especially accelerated with the advent of VoIP, when there is
> additional incentive to get your service from another LEC because it's not
> just purely a matter of someone's POTS vs. someone else's POTS (or ISDN or
> whatever).
>
>    To really know what OCN (Operating Carrier Number) a number is assigned
> for sure, you have to make a query against Neustar's NPAC database, which
> SS7 STPs use to do LNP dips.  Most mere mortals do not have that ability
> readily at their disposal, as for the most part any kind of visibility
> into
> NPAC is contingent upon being a carrier and operating a switch.  Some
> service providers that are not carriers may have it as well, and I don't
> really know what Neustar's guidelines for that are.
>
>    Based on localcallingguide.com, the number you provided is a
> CommPartners
> number, as per:
>
>
> http://www.localcallingguide.com/lca_prefix.php?npa=415&nxx=234&x=&ocn=&region=&lata=&switch=&pastdays=0&nextdays=0
>
>    An LNP dip confirms that this number is in fact part of CommPartners,
> but
> shows it is not in that original OCN.  It is under OCN 533C, which is also
> CommPartners, but possibly a slightly different trunking handoff, or
> whatever the logistical difference is.
>
> Hope that helps,
>
> -- Alex
>
> --
> Alex Balashov   <sasha at presidium.org>
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