Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 515 [Rate centres in NPA 515] [Dial plan for NPA 515]

NXX: 368

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
515-368 A Humboldt IA CNVLIABC1MD  6266 UNITED STATES CELLULAR - IA 632      
515-368 0 Humboldt IA   6266 UNITED STATES CELLULAR - IA 632      
515-368 1 Humboldt IA   6266 UNITED STATES CELLULAR - IA 632      
515-368 2 Humboldt IA   6266 UNITED STATES CELLULAR - IA 632      
515-368 3 Humboldt IA   6266 UNITED STATES CELLULAR - IA 632      
515-368 4 Humboldt IA   6266 UNITED STATES CELLULAR - IA 632      
515-368 5 Humboldt IA   508J CENTURYLINK COMMUNICATIONS, LLC 632   2017-04-01   
515-368 6 Humboldt IA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 632   2017-04-17   
515-368 7 Humboldt IA   221F ONVOY, LLC - IA 632   2016-03-28   
515-368 8 Humboldt IA   221F ONVOY, LLC - IA 632   2013-01-23   
515-368 9 Humboldt IA   221F ONVOY, LLC - IA 632   2012-12-14   

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

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