Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 512 [Rate centres in NPA 512] [Dial plan for NPA 512]

NXX: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
512-300 A Austin TX AUSXTXZR0MD  793K TWC IP ENABLED SERVICES, LLC 558   2025-01-29   
512-300 0 Austin TX   793K TWC IP ENABLED SERVICES, LLC 558      
512-300 1 Austin TX   6529 T-MOBILE USA, INC. 558   2004-03-14   
512-300 2 Austin TX   9533 SOUTHWESTERN BELL 558   2002-02-04   
512-300 3 Austin TX   6529 T-MOBILE USA, INC. 558   2004-03-14   
512-300 4 Austin TX   6529 T-MOBILE USA, INC. 558   2004-03-14   
512-300 5 Austin TX   6529 T-MOBILE USA, INC. 558   2004-03-14   
512-300 6 Austin TX   6529 T-MOBILE USA, INC. 558   2004-01-13   
512-300 7 Austin TX   6529 T-MOBILE USA, INC. 558   2004-01-13   
512-300 8 Austin TX   6529 T-MOBILE USA, INC. 558   2004-01-13   
512-300 9 Austin TX   6529 T-MOBILE USA, INC. 558   2004-01-13   

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

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