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: 575 [Rate centres in NPA 575] [Dial plan for NPA 575]

NXX: 328

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
575-328 A Silver City NM ALBRNMFE5MD  6529 T-MOBILE USA, INC. 664   2024-11-15   
575-328 1 Silver City NM ALBQNMMAXPY  624H ONVOY SPECTRUM, LLC 664   2025-01-22   
575-328 8 Silver City NM ALBRNMFE5MD  6529 T-MOBILE USA, INC. 664   2024-11-15   
575-328 9 Silver City NM ALBRNMFE5MD  6529 T-MOBILE USA, INC. 664   2024-11-15   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.