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: CNCNOHWSXAZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
283-333 4 Cincinnati OH 321J HD CARRIER LLC 922   2024-01-20   
283-333 5 Cincinnati OH 321J HD CARRIER LLC 922   2024-01-20   
283-777 8 Waynesville OH 321J HD CARRIER LLC 922   2023-12-18   
283-888 3 Hamilton OH 321J HD CARRIER LLC 922   2023-11-19   
283-999 3 Little Miami OH 321J HD CARRIER LLC 922   2023-12-14   
513-663 8 Hamilton OH 321J HD CARRIER LLC 922   2020-05-22   
513-993 A Cincinnati OH 321J HD CARRIER LLC 922      
513-993 9 Cincinnati OH 321J HD CARRIER LLC 922   2019-02-10   
812-577 1 Lawrenceburg IN 321J HD CARRIER LLC 922   2018-07-29   
859-818 8 Boone KY 321J HD CARRIER LLC 922   2019-01-10   

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

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