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: SFLDMIWKDS3

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-812 A Pontiac MI 260E YMAX COMMUNICATIONS CORP. - MI 340   2008-11-16   
248-906 A Troy MI 260E YMAX COMMUNICATIONS CORP. - MI 340   2008-11-22   
313-427 A Detroit Zone 6 MI 260E YMAX COMMUNICATIONS CORP. - MI 340   2008-11-17   
313-703 A Detroit Zone 5 MI 260E YMAX COMMUNICATIONS CORP. - MI 340      
313-759 A Detroit Zone 5 MI 260E YMAX COMMUNICATIONS CORP. - MI 340      
734-708 A Maybee MI 260E YMAX COMMUNICATIONS CORP. - MI 340      
810-309 A Flint MI 260E YMAX COMMUNICATIONS CORP. - MI 340   2008-11-16   

Last updated: Sat, 29 Jun 2019 02:32:58 UTC

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