Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 504 [Rate centres in NPA 504] [Dial plan for NPA 504]

NXX: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
504-203 A New Orleans LA NWORLAMAY2X  624H ONVOY SPECTRUM, LLC 490      
504-203 0 New Orleans LA   150C VOICESTREAM GSM I, LLC 490   2023-02-08   
504-203 1 New Orleans LA   624H ONVOY SPECTRUM, LLC 490   2022-12-13   
504-203 2 New Orleans LA   624H ONVOY SPECTRUM, LLC 490   2022-12-13   
504-203 3 New Orleans LA   624H ONVOY SPECTRUM, LLC 490   2022-12-13   
504-203 4 New Orleans LA   749E ONVOY, LLC - LA 490   2022-12-31   
504-203 5 New Orleans LA   749E ONVOY, LLC - LA 490   2022-12-31   
504-203 6 New Orleans LA   749E ONVOY, LLC - LA 490   2022-12-31   
504-203 7 New Orleans LA   150C VOICESTREAM GSM I, LLC 490   2023-02-08   
504-203 8 New Orleans LA   150C VOICESTREAM GSM I, LLC 490   2023-02-08   
504-203 9 New Orleans LA   150C VOICESTREAM GSM I, LLC 490   2023-02-08   

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

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