Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 737 [Rate centres in NPA 737] [Dial plan for NPA 737]

NXX: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-438 A Austin TX AUSTTXGR78Z  883K AHOI LLC 558   2026-05-17   
737-438 0 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2026-05-18   
737-438 1 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2026-05-18   
737-438 2 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-06-15   
737-438 3 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-06-15   
737-438 4 Austin TX AUSTTXGR78Z  883K AHOI LLC 558   2026-05-17   
737-438 5 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-06-15   
737-438 6 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-06-15   
737-438 7 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-06-15   
737-438 8 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2026-05-18   
737-438 9 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-06-15   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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