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: DESMNMXCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
575-245 A Raton NM 713G SIERRA COMMUNICATIONS, INC. - NM 664      
575-278 A Des Moines NM 2259 BACA VALLEY TEL. CO., INC. 664      
575-375 A Maxwell NM 2259 BACA VALLEY TEL. CO., INC. 664      
575-376 4 Cimarron NM 713G SIERRA COMMUNICATIONS, INC. - NM 664   2015-03-19   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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