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: SFLDMIDNKMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-776 0 Detroit Zone 1 MI 732J NUSO, LLC 340   2024-11-18   
313-776 1 Detroit Zone 1 MI 732J NUSO, LLC 340   2024-11-18   
810-291 A Brighton MI 732J NUSO, LLC 340      
810-291 3 Brighton MI 732J NUSO, LLC 340   2022-10-16   
810-306 4 Brighton MI 732J NUSO, LLC 340   2023-12-11   
810-306 5 Brighton MI 732J NUSO, LLC 340   2023-12-11   
810-316 2 Brighton MI 732J NUSO, LLC 340   2024-09-09   
810-316 3 Brighton MI 732J NUSO, LLC 340   2024-09-09   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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