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.

Switch: RUDSNMXC5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
575-310 A Ruidoso NM 206F ONVOY, LLC - NM 664      
575-310 0 Ruidoso NM 206F ONVOY, LLC - NM 664   2023-10-23   
575-310 1 Ruidoso NM 206F ONVOY, LLC - NM 664   2023-10-23   
575-310 3 Ruidoso NM 206F ONVOY, LLC - NM 664   2023-07-20   
575-310 8 Ruidoso NM 206F ONVOY, LLC - NM 664   2024-07-04   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.