Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 319 [Rate centres in NPA 319] [Dial plan for NPA 319]

NXX: 277

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-277 A Cedar Falls IA CDFLIACODS0  9631 QWEST CORPORATION 635      

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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