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: 663

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
505-663 A Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 0 Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 1 Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 2 Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 3 Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 4 Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 5 Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 6 Los Alamos NM ALBQNMMAX2Y  123F BANDWIDTH.COM CLEC, LLC - NM 664   2015-05-10   
505-663 7 Los Alamos NM ALBQNMXMDS0  7464 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 664   2003-05-07   
505-663 8 Los Alamos NM LSALNMMADS0  9636 QWEST CORPORATION 664      
505-663 9 Los Alamos NM LSCRNMFNDS0  5368 MFG. SERVICES, INC. - NM 664   2009-10-18   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.