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: 536

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
225-536 A Baton Rouge LA   478J NUSO, LLC 492   2025-03-17   
225-536 0 Baton Rouge LA   749E ONVOY, LLC - LA 492   2025-04-07   
225-536 1 Baton Rouge LA   478J NUSO, LLC 492   2025-03-17   
225-536 2 Baton Rouge LA   749E ONVOY, LLC - LA 492   2025-04-07   
225-536 8 Baton Rouge LA   749E ONVOY, LLC - LA 492   2025-04-07   
225-536 9 Baton Rouge LA   749E ONVOY, LLC - LA 492   2025-04-07   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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