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: 681

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-681 A Fullerton CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
657-681 0 Fullerton CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-681 1 Fullerton CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-681 2 Fullerton CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-681 3 Fullerton CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-681 4 Fullerton CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-681 5 Fullerton CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-681 6 Fullerton CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
657-681 7 Fullerton CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
657-681 8 Fullerton CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
657-681 9 Fullerton CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.