Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 251 [Rate centres in NPA 251] [Dial plan for NPA 251]

NXX: 506

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
251-506 A Fairhope AL   478J NUSO, LLC 480   2025-06-13   
251-506 0 Fairhope AL   515J IP HORIZON LLC 480   2026-06-28   
251-506 1 Fairhope AL   478J NUSO, LLC 480   2025-06-13   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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