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: MOBLALAZ13Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
228-212 A Tanner-Williams MS 624H ONVOY SPECTRUM, LLC 480      
228-600 A Tanner-Williams MS 624H ONVOY SPECTRUM, LLC 480      
251-364 A Jackson AL 624H ONVOY SPECTRUM, LLC 480      
251-365 A Citronelle AL 624H ONVOY SPECTRUM, LLC 480      
251-372 A Belle Fontaine AL 624H ONVOY SPECTRUM, LLC 480      
251-374 A Mobile AL 624H ONVOY SPECTRUM, LLC 480      
251-901 A Mobile AL 624H ONVOY SPECTRUM, LLC 480      

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

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