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.


NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
580-321 A Rattan OK HUGOOKAL0MD  536   2011-05-21   
580-424 A Hugo OK HUGOOKAL0MD  536   2011-05-21   
580-433 A Valliant OK HUGOOKAL0MD  536   2011-10-20   
580-728 A Idabel OK HUGOOKAL0MD  536   2011-10-20   
580-933 2 Valliant OK   536      
580-933 3 Valliant OK   536      
580-955 A Antlers OK HUGOOKAL0MD  536   2011-05-21   
580-964 A Fort Towson OK HUGOOKAL0MD  536   2011-05-21   

Last updated: Sun, 31 May 2020 11:59:01 UTC

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