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.

Switch: HNVIALDYDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
256-206 9 Athens AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477   2004-09-07   
256-280 9 Decatur AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477   2004-09-07   
256-313 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-319 A Madison AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-327 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-336 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-428 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-450 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-615 A Cullman AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-615 0 Cullman AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-616 A Decatur AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-616 0 Decatur AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-704 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-705 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-730 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-842 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-876 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      
256-955 A Huntsville AL 7451 CENTURYLINK COMMUNICATIONS LLC - AL 477      

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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