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: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-837 A Pomona CA LSANCAJWJMD  516J TON80 COMMUNICATIONS, LLC 730      
840-837 0 Pomona CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
840-837 1 Pomona CA COVNCAXFX3Y  649C ONVOY, LLC - CA 730      
840-837 2 Pomona CA COVNCAXFX3Y  649C ONVOY, LLC - CA 730      
840-837 3 Pomona CA COVNCAXFX2Y  624H ONVOY SPECTRUM, LLC 730      
840-837 4 Pomona CA LSANCAJWJMD  516J TON80 COMMUNICATIONS, LLC 730      
840-837 5 Pomona CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
840-837 6 Pomona CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
840-837 7 Pomona CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
840-837 8 Pomona CA COVNCAXFX2Y  624H ONVOY SPECTRUM, LLC 730      
840-837 9 Pomona CA LSANCARC32Z  073H TELNYX LLC 730      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.