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: 507 [Rate centres in NPA 507] [Dial plan for NPA 507]

NXX: 664

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-664 A Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 0 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 1 Northfield MN ROCHMNHH0MD  447D CHARTER FIBERLINK CCO, LLC - MN 620   2012-07-01   
507-664 2 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 3 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 4 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 5 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 6 Northfield MN MDFDMNAT6MD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 620   2019-10-09   
507-664 7 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 8 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      
507-664 9 Northfield MN NRFDMNNODS0  9631 QWEST CORPORATION 620      

Last updated: Tue, 04 May 2021 15:04:27 UTC

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