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: 225 [Rate centres in NPA 225] [Dial plan for NPA 225]

NXX: 531

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
225-531 A Springfield LA   749E ONVOY, LLC - LA 492   2024-05-02   
225-531 0 Springfield LA   749E ONVOY, LLC - LA 492   2024-05-02   
225-531 1 Springfield LA   515J IP HORIZON LLC 492   2024-05-06   
225-531 8 Springfield LA   749E ONVOY, LLC - LA 492   2024-06-30   
225-531 9 Springfield LA   624H ONVOY SPECTRUM, LLC 492   2024-09-28   

Last updated: Wed, 01 Jan 2025 02:39:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.