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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
737-825 9   177F PEERLESS NETWORK OF TEXAS, LLC - TX 558   2020-08-30   
737-867 A AUSTTXGREMD  939H COMMIO, LLC 558      
737-867 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2018-09-07   
737-867 1   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2016-12-26   
737-867 2   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2016-12-26   
737-867 3   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2016-12-26   
737-867 4   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2016-12-26   
737-867 5   939H COMMIO, LLC 558   2016-12-24   
737-867 6   9533 SOUTHWESTERN BELL 558   2016-12-26   
737-867 7   9533 SOUTHWESTERN BELL 558   2016-12-26   
737-867 8   9533 SOUTHWESTERN BELL 558   2016-12-26   
737-867 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2018-09-07   
737-895 A AUSTTXGR57Z  506J TWILIO INTERNATIONAL, INC. 558      
737-895 0   6529 T-MOBILE USA, INC. 558   2020-10-05   
737-895 1   6529 T-MOBILE USA, INC. 558   2020-10-05   
737-895 2   6529 T-MOBILE USA, INC. 558   2020-10-05   
737-895 3   6529 T-MOBILE USA, INC. 558   2020-10-05   
737-895 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-06-14   
737-895 5   6529 T-MOBILE USA, INC. 558   2021-07-10   
737-895 6   6529 T-MOBILE USA, INC. 558   2021-07-10   
737-895 7   624H ONVOY SPECTRUM, LLC 558   2021-06-14   
737-895 8   624H ONVOY SPECTRUM, LLC 558   2021-06-14   
737-895 9   506J TWILIO INTERNATIONAL, INC. 558   2020-10-04   
737-900 A AUSTTXGR52Z  145J TERRA NOVA TELECOM INC. 558      
737-900 0   145J TERRA NOVA TELECOM INC. 558   2019-05-18   
737-900 1   6529 T-MOBILE USA, INC. 558   2019-09-13   
737-900 2   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2019-10-07   
737-900 3   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2019-10-07   
737-900 4   6529 T-MOBILE USA, INC. 558   2019-09-13   
737-900 5   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2020-05-12   
737-900 6   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2020-05-12   
737-900 7   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2020-05-12   
737-900 8   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2020-05-12   
737-900 9   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2020-05-12   
737-910 A AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-910 0   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 1   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 2   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 3   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 4   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 5   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 6   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2021-03-12   
737-910 7   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 8   903C ONVOY, LLC - TX 558   2021-03-12   
737-910 9   903C ONVOY, LLC - TX 558   2021-02-07   
737-931 A AUSTTXEE7MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 558      
737-931 0   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2017-05-14   
737-931 1   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2017-05-14   
737-931 2   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 558   2016-12-26   
737-931 3   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 558   2016-12-26   
737-931 4   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 558   2016-12-26   
737-931 5   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 558   2016-12-26   
737-931 6   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 558   2016-12-26   
737-931 7   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2017-07-13   
737-931 8   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2016-12-27   
737-931 9   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2016-12-27   
737-932 A AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-932 0   6529 T-MOBILE USA, INC. 558   2013-07-02   
737-932 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2013-07-02   
737-932 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2013-07-02   
737-932 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2013-07-02   
737-932 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2013-07-02   
737-932 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2014-05-10   
737-932 6   903C ONVOY, LLC - TX 558   2013-07-02   
737-932 7   903C ONVOY, LLC - TX 558   2013-07-02   
737-932 8   903C ONVOY, LLC - TX 558   2013-07-01   
737-932 9   6529 T-MOBILE USA, INC. 558   2013-07-02   
737-975 A AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2024-12-05   
737-975 0   903C ONVOY, LLC - TX 558   2024-12-05   
737-975 1   732J NUSO, LLC 558   2024-12-06   
737-975 2   732J NUSO, LLC 558   2024-12-06   
737-975 3   732J NUSO, LLC 558   2024-12-06   
737-975 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2024-12-06   
737-975 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2024-12-06   
737-975 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2024-12-06   
737-975 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2024-12-06   
737-975 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2024-12-06   
737-975 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2024-12-06   
737-977 A AUSTTXGR51Z  965H FRACTEL, LLC 558      
737-977 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-01-29   
737-977 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-01-29   
737-977 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-01-29   
737-977 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-01-29   
737-977 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-01-29   
737-977 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-01-29   
737-977 6   903C ONVOY, LLC - TX 558   2021-03-12   
737-977 7   965H FRACTEL, LLC 558   2021-01-24   
737-977 8   903C ONVOY, LLC - TX 558   2021-03-12   
737-977 9   073H TELNYX LLC 558   2021-02-15   
737-990 A AUSTTXGR46Z  158H INVOXIO INCORPORATED 558      
737-990 0   158H INVOXIO INCORPORATED 558   2018-07-13   
737-990 1   004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-07-15   
737-990 2   004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-07-15   
737-990 3   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2018-07-14   
737-990 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2018-07-14   
737-990 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2018-07-14   
737-990 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2018-07-14   
737-990 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2018-07-14   
737-990 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2018-07-14   
737-990 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2018-07-14   

<< 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

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.