Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

NXX: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-204 A San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 0 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 1 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 2 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 3 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 4 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 5 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 6 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 7 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 8 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-204 9 San Bernardino CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.