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: 831

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-831 A Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 0 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 1 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 2 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 3 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 4 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 5 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 6 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 7 Windom MN OWTNMNOWYMD  508J CENTURYLINK COMMUNICATIONS, LLC 620   2017-05-06   
507-831 8 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      
507-831 9 Windom MN WNDMMNWI83G  9631 QWEST CORPORATION 620      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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