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: 409

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-409 A Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2025-03-02   
737-409 0 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2025-03-02   
737-409 1 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2025-03-02   
737-409 2 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2025-03-02   
737-409 3 Austin TX AUSTTXGR62Z  490J BOOST SUBSCRIBERCO L.L.C. 558   2025-03-03   
737-409 4 Austin TX AUSTTXGR62Z  490J BOOST SUBSCRIBERCO L.L.C. 558   2025-03-03   
737-409 5 Austin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2026-02-09   
737-409 6 Austin TX AUSTTXGR62Z  490J BOOST SUBSCRIBERCO L.L.C. 558   2025-07-12   
737-409 7 Austin TX AUSTTXGR62Z  490J BOOST SUBSCRIBERCO L.L.C. 558   2025-07-12   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.