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: 313

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-313 A Winfield TX LGVWTXPLXRX  612K CSC VOICE, LLC 554      
430-313 0 Winfield TX LGVWTXPLXEX  903C ONVOY, LLC - TX 554   2023-09-15   
430-313 3 Winfield TX LGVWTXBA52Z  145J TERRA NOVA TELECOM INC. 554   2026-01-11   
430-313 6 Winfield TX   612K CSC VOICE, LLC 554   2023-03-12   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.