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.

NPA: 737 [Rate centres in NPA 737] [Dial plan for NPA 737]

NXX: 273

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-273 A Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-273 0 Austin TX AUSTTXGRDS6  177F PEERLESS NETWORK OF TEXAS, LLC - TX 558      
737-273 1 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-273 2 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-273 3 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-273 4 Austin TX AUSTTXUH5MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558      
737-273 5 Austin TX AUSTTXUH5MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558      
737-273 6 Austin TX AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558      
737-273 7 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-273 8 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-273 9 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.