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.

OCN: 806K RGTN USA, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
228-444 A Biloxi MS BILXMSMADS1  484   2025-11-14   
228-444 0 Biloxi MS BILXMSMADS1  484   2025-11-14   
228-444 4 Biloxi MS BILXMSMADS1  484   2025-11-14   
228-444 7 Biloxi MS BILXMSMADS1  484   2025-11-14   
228-444 8 Biloxi MS BILXMSMADS1  484   2025-11-14   
228-587 A Pass Christian MS BILXMSMADS1  484   2025-11-17   
228-587 0 Pass Christian MS BILXMSMADS1  484   2025-11-17   
228-587 2 Pass Christian MS BILXMSMADS1  484   2025-11-17   
228-587 7 Pass Christian MS BILXMSMADS1  484   2025-11-17   
228-587 8 Pass Christian MS BILXMSMADS1  484   2025-11-17   
917-735 A New York City Zone 04 NY NYCMNYZRX4Y  132   2025-08-29   
917-735 1 New York City Zone 04 NY NYCMNYZRX4Y  132   2025-08-29   
929-646 A New York City Zone 05 NY NYCMNYZRX4Y  132   2025-09-05   
929-646 1 New York City Zone 05 NY NYCMNYZRX4Y  132   2025-09-05   

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

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