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: 743 [Rate centres in NPA 743] [Dial plan for NPA 743]

NXX: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
743-557 A Julian NC GNBPNCEM8MD  516J TON80 COMMUNICATIONS, LLC 424      
743-557 0 Julian NC GNBONCEU27Z  998E BANDWIDTH.COM CLEC, LLC - NC 424   2022-03-10   
743-557 1 Julian NC GNBONCEU65Z  8645 SUNCOM DBA T-MOBILE USA 424   2023-01-16   
743-557 2 Julian NC GNBONCEU65Z  8645 SUNCOM DBA T-MOBILE USA 424   2023-01-16   
743-557 5 Julian NC GNBONCEU31Z  8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 424   2022-05-27   
743-557 6 Julian NC GNBONCEU31Z  8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 424   2022-06-21   
743-557 7 Julian NC GNBONCEU31Z  8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 424   2022-05-27   
743-557 8 Julian NC GNBPNCEM8MD  516J TON80 COMMUNICATIONS, LLC 424   2021-06-04   
743-557 9 Julian NC GNBONCEU24Z  638E ONVOY, LLC - NC 424   2023-09-18   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.