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: 238

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-238 A Oelwein IA CDRRIADTKMD  221F ONVOY, LLC - IA 635      
319-238 0 Oelwein IA   6266 UNITED STATES CELLULAR - IA 635   2014-06-30   
319-238 1 Oelwein IA   6266 UNITED STATES CELLULAR - IA 635   2005-05-14   
319-238 2 Oelwein IA   6266 UNITED STATES CELLULAR - IA 635   2005-04-28   
319-238 3 Oelwein IA   6266 UNITED STATES CELLULAR - IA 635   2007-12-14   
319-238 4 Oelwein IA   221F ONVOY, LLC - IA 635   2019-05-11   
319-238 5 Oelwein IA   6266 UNITED STATES CELLULAR - IA 635   2025-01-15   
319-238 6 Oelwein IA   9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635   2010-04-01   
319-238 7 Oelwein IA   221F ONVOY, LLC - IA 635   2008-03-01   
319-238 8 Oelwein IA   593K MCC TELEPHONY LLC 635   2010-05-09   
319-238 9 Oelwein IA   6266 UNITED STATES CELLULAR - IA 635   2011-02-07   

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

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