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: 505 [Rate centres in NPA 505] [Dial plan for NPA 505]

NXX: 621

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
505-621 A Las Vegas NM ALBQNMMAX4Y  206F ONVOY, LLC - NM 664   2024-05-12   
505-621 0 Las Vegas NM ALBQNMMAX4Y  206F ONVOY, LLC - NM 664   2024-05-12   
505-621 1 Las Vegas NM ALBQNMMAX4Y  206F ONVOY, LLC - NM 664   2024-06-29   
505-621 2 Las Vegas NM ALBQNMMAXPY  624H ONVOY SPECTRUM, LLC 664   2025-01-24   
505-621 8 Las Vegas NM ALBQNMMAX4Y  206F ONVOY, LLC - NM 664   2024-12-02   
505-621 9 Las Vegas NM ALBQNMMAX4Y  206F ONVOY, LLC - NM 664   2025-01-09   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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