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: 238

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-238 A Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
840-238 0 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 1 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 2 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 3 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 4 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 5 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 6 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 7 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 8 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   
840-238 9 Pomona CA RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-11-17   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.