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: HNVIALUNX2Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
256-256 A Huntsville AL 624H ONVOY SPECTRUM, LLC 477      
938-213 A Cullman AL 624H ONVOY SPECTRUM, LLC 477      
938-230 A Decatur AL 624H ONVOY SPECTRUM, LLC 477   2024-02-24   
938-310 A Madison AL 624H ONVOY SPECTRUM, LLC 477      
938-338 A Rogersville AL 624H ONVOY SPECTRUM, LLC 477   2024-11-03   
938-410 A Red Bay AL 624H ONVOY SPECTRUM, LLC 477      
938-510 A Russellville AL 624H ONVOY SPECTRUM, LLC 477      
938-833 A Skyline AL 624H ONVOY SPECTRUM, LLC 477      
938-902 A Huntsville AL 624H ONVOY SPECTRUM, LLC 477      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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