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: 420

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
512-420 A Austin TX AUSTTXHODS0  9533 SOUTHWESTERN BELL 558      
512-420 0 Austin TX   9533 SOUTHWESTERN BELL 558      
512-420 1 Austin TX   9533 SOUTHWESTERN BELL 558      
512-420 2 Austin TX   9533 SOUTHWESTERN BELL 558      
512-420 3 Austin TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2013-08-09   
512-420 4 Austin TX   829J PAETEC ITEL, LLC 558   2013-07-15   
512-420 5 Austin TX   829J PAETEC ITEL, LLC 558   2013-07-15   
512-420 6 Austin TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2013-09-26   
512-420 7 Austin TX   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2013-07-15   
512-420 8 Austin TX   9533 SOUTHWESTERN BELL 558      
512-420 9 Austin TX   9533 SOUTHWESTERN BELL 558      

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

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