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: 661 [Rate centres in NPA 661] [Dial plan for NPA 661]

NXX: 668

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
661-668 A Earlimart CA BKFDCA12DS1  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-668 0 Earlimart CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2024-06-07   
661-668 1 Earlimart CA   6010 NEW CINGULAR WIRELESS PCS, LLC 734   2025-06-17   
661-668 2 Earlimart CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2024-07-21   
661-668 3 Earlimart CA   318J COMCAST IP PHONE, LLC 734   2025-03-08   
661-668 4 Earlimart CA BKFDCA12DS1  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-668 5 Earlimart CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2019-02-22   
661-668 6 Earlimart CA BKFDCA11GMD  649C ONVOY, LLC - CA 734   2019-02-22   
661-668 7 Earlimart CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2019-07-02   
661-668 8 Earlimart CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2015-10-13   
661-668 9 Earlimart CA BKFDCA018MD  6010 NEW CINGULAR WIRELESS PCS, LLC 734   2015-10-13   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.