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: CLVSNMXCDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
505-434 A Las Vegas NM 777B PLATEAU TELECOMMUNICATIONS, INC. - NM 664      
575-282 A Tucumcari NM 777B PLATEAU TELECOMMUNICATIONS, INC. - NM 664      
575-325 A Cannon AFB NM 777B PLATEAU TELECOMMUNICATIONS, INC. - NM 664      
575-352 A Springer NM 777B PLATEAU TELECOMMUNICATIONS, INC. - NM 664      
575-755 A Roswell NM 777B PLATEAU TELECOMMUNICATIONS, INC. - NM 664      
575-935 A Clovis NM 777B PLATEAU TELECOMMUNICATIONS, INC. - NM 664      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.