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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
947-999 9 Pontiac MI 543C ONVOY, LLCV - MI 340   2015-11-23   
989-271 1 Gaines MI 543C ONVOY, LLCV - MI 340   2023-07-23   
989-271 4 Gaines MI 543C ONVOY, LLCV - MI 340   2023-03-17   
989-461 3 Gaines MI 543C ONVOY, LLCV - MI 340   2017-05-19   
989-461 4 Gaines MI 543C ONVOY, LLCV - MI 340   2013-03-15   
989-461 6 Gaines MI 543C ONVOY, LLCV - MI 340   2021-03-05   
989-461 7 Gaines MI 543C ONVOY, LLCV - MI 340   2021-03-05   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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