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: 503

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-503 A Cedar Rapids IA   478J NUSO, LLC 635   2025-04-24   
319-503 1 Cedar Rapids IA   478J NUSO, LLC 635   2025-04-24   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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