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: DTRTMIBHGMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-398 2 Detroit Zone 1 MI 156J RCLEC, INC. 340   2015-12-17   
313-426 7 Detroit Zone 1 MI 156J RCLEC, INC. 340   2017-03-18   
313-725 6 Detroit Zone 1 MI 156J RCLEC, INC. 340   2019-02-15   
313-752 3 Detroit Zone 1 MI 156J RCLEC, INC. 340   2017-01-14   
313-960 A Detroit Zone 1 MI 156J RCLEC, INC. 340      
313-960 4 Detroit Zone 1 MI 156J RCLEC, INC. 340   2014-09-21   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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