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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SFLDMIDIDS2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-329 A Milford-White Lake MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
248-574 A Walled Lake MI 672B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
248-774 A Southfield MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
248-970 A West Bloomfield MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
248-970 7 West Bloomfield MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340   2017-02-23   
313-379 A Detroit Zone 1 MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
313-379 7 Detroit Zone 1 MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340   2017-04-24   
313-432 3 Detroit Zone 2 MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
313-432 4 Detroit Zone 2 MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
586-723 2 Mount Clemens MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
586-723 3 Mount Clemens MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
586-723 4 Mount Clemens MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
586-723 5 Mount Clemens MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
586-723 6 Mount Clemens MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
810-957 A Linden MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340      
810-957 7 Linden MI 279B CLEAR RATE COMMUNICATIONS, INC. - MI 340   2010-06-12   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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