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: 323

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-323 A Longview TX LGVWTX06X0X  732J NUSO, LLC 554      
430-323 0 Longview TX   515J IP HORIZON LLC 554   2023-12-28   
430-323 1 Longview TX   515J IP HORIZON LLC 554   2023-12-28   
430-323 2 Longview TX   732J NUSO, LLC 554   2023-04-09   
430-323 3 Longview TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 554   2025-01-26   
430-323 4 Longview TX   903C ONVOY, LLC - TX 554   2023-06-26   
430-323 5 Longview TX   732J NUSO, LLC 554   2023-11-25   
430-323 6 Longview TX   732J NUSO, LLC 554   2023-11-25   
430-323 7 Longview TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 554   2025-01-26   
430-323 8 Longview TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 554   2025-05-30   
430-323 9 Longview TX   903C ONVOY, LLC - TX 554   2024-07-08   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.