Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 541 [Rate centres in NPA 541] [Dial plan for NPA 541]

NXX: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
541-578 A Mosier OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
541-578 0 Mosier OR   6529 T-MOBILE USA, INC. 672      
541-578 1 Mosier OR   145J TERRA NOVA TELECOM INC. 672   2025-07-10   
541-578 2 Mosier OR   3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672   2023-02-23   
541-578 3 Mosier OR   750E ONVOY, LLC - OR 672   2022-01-01   
541-578 4 Mosier OR   750E ONVOY, LLC - OR 672   2022-01-01   
541-578 5 Mosier OR   750E ONVOY, LLC - OR 672   2021-06-01   
541-578 6 Mosier OR   6529 T-MOBILE USA, INC. 672   2022-11-24   
541-578 7 Mosier OR   508J CENTURYLINK COMMUNICATIONS, LLC 672   2013-12-09   
541-578 8 Mosier OR   750E ONVOY, LLC - OR 672   2021-12-10   
541-578 9 Mosier OR   6010 NEW CINGULAR WIRELESS PCS, LLC 672   2016-01-06   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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