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: 937

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
909-937 A Ontario CA ONTRCAXMDS0  2319 FRONTIER CALIFORNIA INC. 730      
909-937 0 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 1 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 2 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 3 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 4 Ontario CA   829J PAETEC ITEL, LLC 730   2004-04-02   
909-937 5 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 6 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 7 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 8 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      
909-937 9 Ontario CA   2319 FRONTIER CALIFORNIA INC. 730      

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

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