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: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
562-604 A Whittier CA COVNCAXFX3Y  649C ONVOY, LLC - CA 730   2024-05-12   
562-604 0 Whittier CA COVNCAXFX3Y  649C ONVOY, LLC - CA 730   2024-05-12   
562-604 1 Whittier CA COVNCAXFX2Y  624H ONVOY SPECTRUM, LLC 730   2024-05-22   
562-604 2 Whittier CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2024-09-18   
562-604 7 Whittier CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-11-09   
562-604 8 Whittier CA COVNCAXFX2Y  624H ONVOY SPECTRUM, LLC 730   2024-05-22   
562-604 9 Whittier CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-11-27   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.