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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Switch: HDVLOKMARS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
405-379 A Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 1 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 2 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 3 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 4 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 5 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 6 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 7 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 8 Holdenville OK 9533 SOUTHWESTERN BELL 536      
405-379 9 Holdenville OK 9533 SOUTHWESTERN BELL 536      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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