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: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 366

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-366 A Yorba Linda CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730      
657-366 0 Yorba Linda CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2018-11-23   
657-366 1 Yorba Linda CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2018-11-23   
657-366 2 Yorba Linda CA LSANCAJW6MD  073H TELNYX LLC 730   2018-11-24   
657-366 3 Yorba Linda CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2019-06-19   
657-366 4 Yorba Linda CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2020-07-06   
657-366 5 Yorba Linda CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2020-07-06   
657-366 6 Yorba Linda CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2019-09-09   
657-366 7 Yorba Linda CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2019-09-09   
657-366 8 Yorba Linda CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2019-07-20   
657-366 9 Yorba Linda CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2018-11-24   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.