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: 483 [Rate centres in NPA 483] [Dial plan for NPA 483]

NXX: 997

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
483-997 A Montgomery AL   604E ONVOY, LLC - AL 478   2026-10-09   
483-997 4 Montgomery AL   604E ONVOY, LLC - AL 478   2026-10-09   
483-997 9 Montgomery AL   604E ONVOY, LLC - AL 478   2026-10-09   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.