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.
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Durant, OK

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
580-931 2 DRNTOKMADS2  9533 SOUTHWESTERN BELL 536      
580-931 3 DRNTOKMADS2  9533 SOUTHWESTERN BELL 536      
580-931 4 OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2021-05-28   
580-931 5 OKCYOKCEDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2019-07-11   
580-931 6 DRNTOKMADS2  9533 SOUTHWESTERN BELL 536      
580-931 7 ENIDOKKI0MD  6272 UNITED STATES CELLULAR - OK 536      
580-931 8 DRNTOKMADS2  9533 SOUTHWESTERN BELL 536      
580-931 9 DRNTOKMADS2  9533 SOUTHWESTERN BELL 536      

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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