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: 945 [Rate centres in NPA 945] [Dial plan for NPA 945]

NXX: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
945-406 A Red Oak TX   903C ONVOY, LLC - TX 552   2025-11-13   
945-406 0 Red Oak TX   903C ONVOY, LLC - TX 552   2025-11-13   
945-406 1 Red Oak TX   903C ONVOY, LLC - TX 552   2026-01-10   
945-406 2 Red Oak TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2026-05-09   
945-406 3 Red Oak TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2026-05-09   

Last updated: Sun, 17 May 2026 03:26:51 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.