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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OCN: 4044 GLOBAL CROSSING TELEMANAGEMENT, INC. - MI

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
248-436 A Southfield MI SFLDMIOL1MD  340      
248-436 0 Southfield MI SFLDMIOL1MD  340      
313-544 A Detroit Zone 4 MI SFLDMIOL1MD  340      
586-863 9 Roseville MI SFLDMIOL1MD  340      
586-935 A Washington MI SFLDMIOL1MD  340      
734-271 A Carleton MI SFLDMIOL1MD  340      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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