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: 405 [Rate centres in NPA 405] [Dial plan for NPA 405]

NXX: 668

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
405-668 A Fort Cobb OK OKCYOKMTG01  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536      
405-668 0 Fort Cobb OK OKCYOKMTG01  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536      
405-668 1 Fort Cobb OK OKCYOKCEXBZ  073H TELNYX LLC 536   2019-01-21   
405-668 2 Fort Cobb OK OKCYOKMTG01  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2007-10-05   
405-668 3 Fort Cobb OK OKCYOKMTG01  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2011-07-09   
405-668 4 Fort Cobb OK OKCYOKMTG01  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536      
405-668 5 Fort Cobb OK OKCYOKCEXXY  516C AT&T CORP. 536   2015-04-27   
405-668 6 Fort Cobb OK OKCYOKCEXOY  530C TELEPORT COMMUNICATIONS AMERICA OK - LLC 536   2019-03-07   
405-668 7 Fort Cobb OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2020-07-12   
405-668 8 Fort Cobb OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2021-03-04   
405-668 9 Fort Cobb OK OKCYOKCEDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2016-02-19   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.