Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 909 [Rate centres in NPA 909] [Dial plan for NPA 909]

NXX: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
909-321 A Ontario CA LSANCAJW2MD  508J CENTURYLINK COMMUNICATIONS, LLC 730      
909-321 0 Ontario CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2017-01-27   
909-321 1 Ontario CA   649C ONVOY, LLC - CA 730   2012-09-12   
909-321 2 Ontario CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2012-12-13   
909-321 3 Ontario CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2011-10-27   
909-321 4 Ontario CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2012-12-13   
909-321 5 Ontario CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2012-08-06   
909-321 6 Ontario CA   649C ONVOY, LLC - CA 730   2013-03-08   
909-321 7 Ontario CA   508J CENTURYLINK COMMUNICATIONS, LLC 730   2013-03-15   
909-321 8 Ontario CA   649C ONVOY, LLC - CA 730   2013-06-13   
909-321 9 Ontario CA   649C ONVOY, LLC - CA 730   2013-03-29   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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