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: 574 [Rate centres in NPA 574] [Dial plan for NPA 574]

NXX: 388

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
574-388 A Lapaz IN PLMOINXAX2X  097D ONVOY, LLC - IN 332      
574-388 0 Lapaz IN SBNDIN13NMD  490J DISH WIRELESS, LLC 332   2023-05-28   
574-388 5 Lapaz IN PLMOINXAX2X  097D ONVOY, LLC - IN 332   2021-11-21   
574-388 6 Lapaz IN PLMOINXAX2X  097D ONVOY, LLC - IN 332   2021-11-21   
574-388 8 Lapaz IN   145J TERRA NOVA TELECOM INC. 332   2025-05-27   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.