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-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
586-571 1 Center Line MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2016-11-07   
586-619 3 Center Line MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
586-648 5 New Baltimore MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2010-10-21   
586-649 6 Mount Clemens MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
586-676 9 Mount Clemens MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2017-07-27   
586-843 1 Utica MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2014-09-21   
586-884 5 Utica MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-217 3 Ypsilanti MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-225 9 Wyandotte MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-233 6 Plymouth MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-237 5 Livonia MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-239 8 Ann Arbor MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-391 3 Belleville MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2010-11-14   
734-398 4 Wayne MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
734-413 2 Romulus MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
810-207 4 Hartland MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
810-250 5 Flint MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
810-354 0 Fenton MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
810-355 7 Brighton MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
810-479 8 Port Huron MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2006-09-21   
810-637 2 St Clair MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2010-07-21   
947-201 8 Auburn Heights MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2017-07-27   
947-414 8 Pontiac MI 9714 GRID 4 COMMUNICATIONS, INC. - MI 340   2017-07-27   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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