Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 831 [Rate centres in NPA 831] [Dial plan for NPA 831]

NXX: 778

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-778 A San Lucas CA SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-778 1 San Lucas CA SLNSCA01XCY  624H ONVOY SPECTRUM, LLC 736   2024-01-05   
831-778 2 San Lucas CA SLNSCA01X9Y  649C ONVOY, LLC - CA 736   2022-01-28   
831-778 3 San Lucas CA SLNSCA01X5Y  516C AT&T CORP. 736   2025-01-15   
831-778 4 San Lucas CA SLNSCA01XXX  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736   2005-07-31   
831-778 7 San Lucas CA   145J TERRA NOVA TELECOM INC. 736   2022-08-03   
831-778 9 San Lucas CA MTRYCAPMDS0  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-03-05   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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