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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Switch: DLTHMNEH00Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
218-613 A Duluth MN 490J BOOST SUBSCRIBERCO L.L.C. 624      
218-613 9 Duluth MN 490J BOOST SUBSCRIBERCO L.L.C. 624   2023-05-02   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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