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: 317

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-317 A Dripping Springs TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-317 0 Dripping Springs TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2021-09-10   
737-317 1 Dripping Springs TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2021-09-10   
737-317 2 Dripping Springs TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2021-03-14   
737-317 3 Dripping Springs TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2022-12-15   
737-317 4 Dripping Springs TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2021-03-14   
737-317 5 Dripping Springs TX AUSTTXGR52Z  145J TERRA NOVA TELECOM INC. 558   2022-10-18   
737-317 6 Dripping Springs TX AUSTTXGR45Z  624H ONVOY SPECTRUM, LLC 558   2021-06-27   
737-317 7 Dripping Springs TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2021-04-30   
737-317 8 Dripping Springs TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2021-04-30   
737-317 9 Dripping Springs TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2021-09-10   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.