Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 254 [Rate centres in NPA 254] [Dial plan for NPA 254]

NXX: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
254-604 A Killeen TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 556   2025-11-07   
254-604 0 Killeen TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 556   2025-11-23   
254-604 7 Killeen TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 556   2025-11-23   
254-604 8 Killeen TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 556   2025-11-23   
254-604 9 Killeen TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 556   2025-11-23   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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