Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Claremont-San Dimas, CA

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
909-971 7 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-12-04   
909-971 8 SNDMCAXF59C  2319 FRONTIER CALIFORNIA INC. 730      
909-971 9 SNDMCAXF59C  2319 FRONTIER CALIFORNIA INC. 730      

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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