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: SFLDMIMKDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-996 A Southfield MI 473D CMC TELECOM, INC. - MI 340      
248-996 1 Southfield MI 473D CMC TELECOM, INC. - MI 340   2005-11-13   
313-203 8 Detroit Zone 6 MI 473D CMC TELECOM, INC. - MI 340   2006-03-09   
586-329 7 Mount Clemens MI 473D CMC TELECOM, INC. - MI 340   2008-01-07   
586-360 2 Roseville MI 473D CMC TELECOM, INC. - MI 340   2006-01-14   
810-377 2 Lexington MI 473D CMC TELECOM, INC. - MI 340   2008-01-17   
810-476 1 Applegate MI 473D CMC TELECOM, INC. - MI 340   2008-01-17   
810-644 4 Swartz Creek MI 473D CMC TELECOM, INC. - MI 340   2008-01-19   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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