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: 397

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
505-397 A Gallup NM ALBRNMFE5MD  6529 T-MOBILE USA, INC. 664      
505-397 0 Gallup NM   6529 T-MOBILE USA, INC. 664   2021-01-14   
505-397 1 Gallup NM   6529 T-MOBILE USA, INC. 664   2021-01-14   
505-397 2 Gallup NM   6529 T-MOBILE USA, INC. 664   2021-01-14   
505-397 3 Gallup NM   206F ONVOY, LLC - NM 664   2024-10-20   
505-397 4 Gallup NM   6529 T-MOBILE USA, INC. 664   2021-01-14   
505-397 5 Gallup NM   206F ONVOY, LLC - NM 664   2020-12-20   
505-397 6 Gallup NM   206F ONVOY, LLC - NM 664   2020-12-20   
505-397 7 Gallup NM   6573 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 664   2021-02-22   
505-397 8 Gallup NM   6529 T-MOBILE USA, INC. 664   2020-12-14   
505-397 9 Gallup NM   6529 T-MOBILE USA, INC. 664   2020-12-14   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.