Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 840 [Rate centres in NPA 840] [Dial plan for NPA 840]

NXX: 280

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-280 A San Bernardino CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2025-09-18   
840-280 0 San Bernardino CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-09-19   
840-280 1 San Bernardino CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-10-16   
840-280 6 San Bernardino CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2025-09-18   
840-280 8 San Bernardino CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-11-12   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

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