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: 562 [Rate centres in NPA 562] [Dial plan for NPA 562]

NXX: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
562-521 A Norwalk CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
562-521 0 Norwalk CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
562-521 1 Norwalk CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
562-521 2 Norwalk CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
562-521 3 Norwalk CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
562-521 4 Norwalk CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
562-521 5 Norwalk CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
562-521 6 Norwalk CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
562-521 7 Norwalk CA LSANCARCD6S  252F WIDE VOICE, LLC - CA 730      
562-521 8 Norwalk CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730      
562-521 9 Norwalk CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.