Local Calling Guide

Area code/prefix search

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

NXX: 288

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-288 A San Bernardino CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2026-04-12   
840-288 2 San Bernardino CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2026-04-12   

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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