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: 721

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
505-721 A Gallup NM GLLPNMMADS0  9636 QWEST CORPORATION 664      
505-721 0 Gallup NM   6529 T-MOBILE USA, INC. 664   2014-02-25   
505-721 1 Gallup NM   9636 QWEST CORPORATION 664   2003-10-15   
505-721 2 Gallup NM   9636 QWEST CORPORATION 664   2003-10-15   
505-721 3 Gallup NM   9636 QWEST CORPORATION 664   2003-10-15   
505-721 4 Gallup NM   9636 QWEST CORPORATION 664   2003-10-15   
505-721 5 Gallup NM   9636 QWEST CORPORATION 664   2003-10-15   
505-721 6 Gallup NM   6529 T-MOBILE USA, INC. 664   2014-03-27   
505-721 7 Gallup NM   6529 T-MOBILE USA, INC. 664   2013-09-13   
505-721 8 Gallup NM   6529 T-MOBILE USA, INC. 664   2013-11-08   
505-721 9 Gallup NM   6573 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 664   2007-02-19   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.