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: WRRNMIMNRPA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
586-264 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-268 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-274 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-276 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-446 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-795 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-825 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-826 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-939 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-977 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-978 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-979 A Warren MI 9323 MICHIGAN BELL TEL CO 340      
586-983 A Warren MI 9323 MICHIGAN BELL TEL CO 340      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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