Hi Alex, <br>This is a nice summary. Thanks a lot for your response. <br>My mere interest was to find out <br>(1) if a number is a mobile number<br>(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.
<br><br>Ritesh<br><br><br><div><span class="gmail_quote">On 5/19/07, <b class="gmail_sendername">Alex Balashov</b> <<a href="mailto:abalashov@evaristesys.com">abalashov@evaristesys.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Wed, 9 May 2007, Ritesh Agrawal said something to this effect:<br><br>> Is there a way to find out the mobile/landline carrier name based on the<br>> phone number?<br><br> Ordinary people can only find this out if the NPA-NXX (area code +
<br>exchange, i.e. the first six digits) block to which the number belongs<br>is assigned or delegated to a particular mobile carrier. So, what you'd<br>really be looking up is a particular NPA-NXX block's registered ownership.
<br><br> There are many ways to get this information. You can go to<br><a href="http://localcallingguide.com">localcallingguide.com</a> and do an "Area Code/Prefix/OCN" search. There's<br>also <a href="http://telcodata.us">
telcodata.us</a>, and I imagine some others. Or you can download the<br>NXX block assignment spreadsheet straight from NANPA's web site. This<br>type of CO information is public and relatively ubiquitous, if you know
<br>where to look.<br><br> One caveat is that this information can be somewhat out of date or<br>inaccurate, especially in 10000-blocks that have subdelegations across<br>carriers.<br><br> The other is that this will not properly identify a phone number's origin
<br>for you if it's been ported away from the block-owning carrier under the<br>Local Number Portability regime, to someone else in the LATA. This trend<br>has become especially accelerated with the advent of VoIP, when there is
<br>additional incentive to get your service from another LEC because it's not<br>just purely a matter of someone's POTS vs. someone else's POTS (or ISDN or<br>whatever).<br><br> To really know what OCN (Operating Carrier Number) a number is assigned
<br>for sure, you have to make a query against Neustar's NPAC database, which<br>SS7 STPs use to do LNP dips. Most mere mortals do not have that ability<br>readily at their disposal, as for the most part any kind of visibility into
<br>NPAC is contingent upon being a carrier and operating a switch. Some<br>service providers that are not carriers may have it as well, and I don't<br>really know what Neustar's guidelines for that are.<br><br> Based on
<a href="http://localcallingguide.com">localcallingguide.com</a>, the number you provided is a CommPartners<br>number, as per:<br><br> <a href="http://www.localcallingguide.com/lca_prefix.php?npa=415&nxx=234&x=&ocn=&region=&lata=&switch=&pastdays=0&nextdays=0">
http://www.localcallingguide.com/lca_prefix.php?npa=415&nxx=234&x=&ocn=&region=&lata=&switch=&pastdays=0&nextdays=0</a><br><br> An LNP dip confirms that this number is in fact part of CommPartners, but
<br>shows it is not in that original OCN. It is under OCN 533C, which is also<br>CommPartners, but possibly a slightly different trunking handoff, or<br>whatever the logistical difference is.<br><br>Hope that helps,<br><br>
-- Alex<br><br>--<br>Alex Balashov <<a href="mailto:sasha@presidium.org">sasha@presidium.org</a>><br>_______________________________________________<br>--Bandwidth and Colocation provided by <a href="http://Easynews.com">
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