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: 430 [Rate centres in NPA 430] [Dial plan for NPA 430]

NXX: 727

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-727 A Henderson TX   903C ONVOY, LLC - TX 554   2025-04-20   
430-727 0 Henderson TX   903C ONVOY, LLC - TX 554      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.