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.

OCN: 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - 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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
737-273 6 Austin TX AUSTTXGR09Z  558   2020-02-23   
737-280 0 Austin TX AUSTTXGR09Z  558   2020-11-29   
737-289 A Austin TX AUSTTXGR09Z  558      
737-289 1 Austin TX AUSTTXGR09Z  558   2021-08-24   
737-289 2 Austin TX AUSTTXGR09Z  558   2021-08-24   
737-289 3 Austin TX AUSTTXGR09Z  558   2021-08-24   
737-289 6 Austin TX AUSTTXGR09Z  558   2021-08-23   
737-289 7 Austin TX AUSTTXGR09Z  558   2021-08-24   
737-295 6 Austin TX AUSTTXGR09Z  558   2021-10-25   
737-313 6 Austin TX AUSTTXGR09Z  558   2023-01-11   
737-319 A Austin TX AUSTTXGR09Z  558      
737-319 0 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 1 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 2 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 3 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 4 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 5 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 6 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 7 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 8 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-319 9 Austin TX AUSTTXGR09Z  558   2022-04-08   
737-320 6 Austin TX AUSTTXGR09Z  558   2022-08-01   
737-356 4 Georgetown TX AUSTTXGR09Z  558   2019-11-04   
737-356 5 Georgetown TX AUSTTXGR09Z  558   2019-11-04   
737-356 6 Georgetown TX AUSTTXGR09Z  558   2019-11-04   
737-373 6 San Marcos TX AUSTTXGR09Z  558   2019-08-08   
737-375 6 Rockdale TX AUSTTXGR09Z  558   2022-07-11   
737-401 A Austin TX AUSTTXGR09Z  558      
737-401 0 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 1 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 2 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 3 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 4 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 5 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 6 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 7 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 8 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-401 9 Austin TX AUSTTXGR09Z  558   2016-12-02   
737-402 3 Austin TX AUSTTXGRDS7  558   2017-01-27   
737-402 4 Austin TX AUSTTXGRDS7  558   2017-02-10   
737-402 5 Austin TX AUSTTXGRDS7  558   2017-02-10   
737-404 6 Kyle TX AUSTTXGR09Z  558   2016-04-25   
737-415 6 Austin TX AUSTTXGR09Z  558   2025-04-28   
737-434 7 Austin TX AUSTTXGR09Z  558   2026-04-17   
737-434 8 Austin TX AUSTTXGR09Z  558   2026-04-17   
737-442 A Austin TX AUSTTXGR09Z  558   2026-07-30   
737-442 8 Austin TX AUSTTXGR09Z  558   2026-07-30   
737-465 4 Austin TX AUSTTXGR09Z  558   2019-08-23   
737-465 5 Austin TX AUSTTXGR09Z  558   2019-08-23   
737-465 6 Austin TX AUSTTXGR09Z  558   2019-08-23   

<< 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 >>

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.