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
737-423 6   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-10-03   
737-423 7   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-10-23   
737-423 8   903C ONVOY, LLC - TX 558   2025-10-18   
737-423 9   903C ONVOY, LLC - TX 558   2025-10-18   
737-428 A   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-428 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2025-12-13   
737-429 A   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 0   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 1   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 2   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 3   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 4   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 5   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 6   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 7   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 8   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-429 9   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2025-12-29   
737-430 A   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-430 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2026-01-04   
737-431 A   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 0   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 1   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 2   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 3   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 4   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 5   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 6   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 7   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 8   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-431 9   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2026-02-06   
737-443 A AUSTTXUH5MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558      
737-443 0 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2016-08-15   
737-443 1   515J IP HORIZON LLC 558   2016-08-13   
737-443 2 AUSTTXUH5MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2016-08-14   
737-443 3 AUSTTXUH5MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2016-08-14   
737-443 4 AUSTTXUH5MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2016-08-14   
737-443 5 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2016-08-14   
737-443 6 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2016-08-14   
737-443 7 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2016-08-15   
737-443 8 AUSXTXZR0MD  793K TWC IP ENABLED SERVICES, LLC 558   2016-09-22   
737-443 9 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2017-09-28   
737-465 A AUSTTXGR51Z  965H FRACTEL, LLC 558      
737-465 0 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2019-08-31   
737-465 1 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2019-08-31   
737-465 2 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2019-08-31   
737-465 3 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2019-08-31   
737-465 4 AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2019-08-23   
737-465 5 AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2019-08-23   
737-465 6 AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2019-08-23   
737-465 7 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2019-08-31   
737-465 8   965H FRACTEL, LLC 558   2019-07-17   
737-465 9 AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2019-08-31   
737-471 A AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558      
737-471 0 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-04-26   
737-471 1 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-04-26   
737-471 2 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-04-26   
737-471 3 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-04-26   
737-471 4 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-04-26   
737-471 5 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-04-26   
737-471 6 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-04-26   
737-471 7 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558   2018-04-21   
737-471 8 AUSTTXGRDS5  9533 SOUTHWESTERN BELL 558   2018-04-21   
737-471 9 AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2018-07-15   
737-484 A AUSUTX78DS0  7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
737-484 0 AUSXTXZR0MD  793K TWC IP ENABLED SERVICES, LLC 558   2015-08-31   
737-484 1 AUSXTXZR0MD  793K TWC IP ENABLED SERVICES, LLC 558   2015-08-31   
737-484 2 AUSWTXGXBMD  6529 T-MOBILE USA, INC. 558   2015-09-18   
737-484 3 AUSUTX78DS0  7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558   2015-08-21   
737-484 4 AUSTTXGRDS7  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2015-09-14   
737-484 5 AUSTTXGRDS7  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2015-09-14   
737-484 6 AUSWTXGXBMD  6529 T-MOBILE USA, INC. 558   2015-09-18   
737-484 7 AUSWTXGXBMD  6529 T-MOBILE USA, INC. 558   2015-09-18   
737-484 8 AUSXTXZR0MD  793K TWC IP ENABLED SERVICES, LLC 558   2015-09-24   
737-484 9 AUSXTXZR0MD  793K TWC IP ENABLED SERVICES, LLC 558   2015-09-24   
737-497 A AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-497 0 AUSYTXFC0MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2023-07-09   
737-497 1 AUSUTX78AMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2023-05-18   
737-497 2 AUSUTX78AMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2023-05-18   
737-497 3 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2023-03-13   
737-497 4 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2023-03-13   
737-497 5 AUSUTX78AMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2023-05-18   
737-497 6 AUSUTX78AMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2023-05-18   

<< 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: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.