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: SFLDMITOEMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-380 8 Detroit Zone 6 MI 495J STRATUS NETWORKS 340   2021-05-28   
313-542 8 Detroit Zone 5 MI 495J STRATUS NETWORKS 340   2021-06-11   
313-644 8 Detroit Zone 3 MI 495J STRATUS NETWORKS 340   2021-06-15   
517-291 A Adrian MI 495J STRATUS NETWORKS 340      
517-291 1 Adrian MI 495J STRATUS NETWORKS 340   2021-05-17   
586-287 A Mount Clemens MI 495J STRATUS NETWORKS 340      
586-287 1 Mount Clemens MI 495J STRATUS NETWORKS 340   2021-07-25   
586-355 0 Richmond MI 495J STRATUS NETWORKS 340   2021-05-28   
810-886 8 Brown City MI 495J STRATUS NETWORKS 340   2021-05-28   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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