Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Austin, TX

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
512-975 1 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2015-01-09   
512-975 2 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2015-09-28   
512-975 3 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2015-09-28   
512-975 4 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2015-09-28   
512-975 5 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2015-01-09   
512-975 6 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2015-09-21   
512-975 7 AUSWTXOO2MD  829J PAETEC ITEL, LLC 558   2015-09-22   
512-975 8 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2015-09-21   
512-975 9 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2015-01-09   
512-977 A AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 0 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 1 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 2 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 3 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 4 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 5 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 6 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 7 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-977 8 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-08-30   
512-977 9 AUSTTXTEDS0  9533 SOUTHWESTERN BELL 558      
512-978 A AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 0 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 1 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 2 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 3 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 4 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 5 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 6 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 7 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 8 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-978 9 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
512-979 A AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558      
512-979 0 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 1 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 2 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 3 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 4 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 5 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 6 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 7 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 8 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-979 9 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2023-10-15   
512-981 A AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558      
512-981 0 AUSWTXGXBMD  5562 METROPCS, INC. 558   2009-12-16   
512-981 1 AUSWTXGXBMD  5562 METROPCS, INC. 558   2009-12-18   
512-981 2 AUSWTXGXBMD  5562 METROPCS, INC. 558   2009-12-23   
512-981 3 AUSWTXGXBMD  5562 METROPCS, INC. 558   2013-07-28   
512-981 4 AUSTTXHIDS0  9533 SOUTHWESTERN BELL 558   2009-08-07   
512-981 5 AUSYTXFC0MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2010-01-16   
512-981 6 AUSYTXFC0MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2010-01-16   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.