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.
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NPA: 575 [Rate centres in NPA 575] [Dial plan for NPA 575]

NXX: 439

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
575-439 A Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 0 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 1 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 2 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 3 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 4 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 5 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 6 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 7 Alamogordo NM ALBQNMMAXCY  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 664      
575-439 8 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      
575-439 9 Alamogordo NM ALMGNMMADS0  9636 QWEST CORPORATION 664      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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