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: 505 [Rate centres in NPA 505] [Dial plan for NPA 505]

NXX: 668

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
505-668 A Farmington NM   6010 NEW CINGULAR WIRELESS PCS, LLC 664   2025-10-24   
505-668 4 Farmington NM   6010 NEW CINGULAR WIRELESS PCS, LLC 664   2025-10-24   
505-668 5 Farmington NM   6010 NEW CINGULAR WIRELESS PCS, LLC 664   2025-10-24   
505-668 6 Farmington NM   6010 NEW CINGULAR WIRELESS PCS, LLC 664   2025-10-24   
505-668 7 Farmington NM   6010 NEW CINGULAR WIRELESS PCS, LLC 664   2025-10-24   
505-668 8 Farmington NM   6010 NEW CINGULAR WIRELESS PCS, LLC 664   2025-10-24   
505-668 9 Farmington NM   6010 NEW CINGULAR WIRELESS PCS, LLC 664   2025-10-24   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.