Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 337 [Rate centres in NPA 337] [Dial plan for NPA 337]

NXX: 379

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
337-379 A Iowa LA LKCHLADTXDX  5562 METROPCS, INC. 488      
337-379 0 Iowa LA   5562 METROPCS, INC. 488      
337-379 1 Iowa LA   624H ONVOY SPECTRUM, LLC 488   2023-07-23   
337-379 2 Iowa LA   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 488   2025-01-03   
337-379 4 Iowa LA   153F BANDWIDTH.COM CLEC, LLC - LA 488   2023-09-14   
337-379 5 Iowa LA   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 488   2023-04-30   
337-379 6 Iowa LA   653C TELEPORT COMMUNICATIONS AMERICA LA - LLC 488   2023-02-03   
337-379 7 Iowa LA   749E ONVOY, LLC - LA 488   2022-12-03   
337-379 8 Iowa LA   749E ONVOY, LLC - LA 488   2022-12-03   
337-379 9 Iowa LA   749E ONVOY, LLC - LA 488   2023-09-18   

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

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