Local Calling Guide

Area code/prefix search

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NPA: 840 [Rate centres in NPA 840] [Dial plan for NPA 840]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-688 A Crestline CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-699 A Ontario CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-777 A Pomona CA LSANCAJWHMD  145J TERRA NOVA TELECOM INC. 730      
840-788 A Fontana CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-799 A Rialto CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-800 A Upland CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-804 A Claremont-San Dimas CA COVNCAXFX3Y  649C ONVOY, LLC - CA 730   2024-01-23   
840-837 A Pomona CA LSANCAJWJMD  516J TON80 COMMUNICATIONS, LLC 730      
840-840 A Ontario CA   624H ONVOY SPECTRUM, LLC 730   2025-11-11   
840-877 A Marshall CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-888 A Redlands CA LSANCAJWHMD  145J TERRA NOVA TELECOM INC. 730      
840-899 A Highland CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-900 A Rialto CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-977 A Claremont-San Dimas CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-999 A Upland CA LSANCAJWHMD  145J TERRA NOVA TELECOM INC. 730      

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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