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: SAYROKMARS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
580-928 A Sayre OK 9533 SOUTHWESTERN BELL 536      
580-928 1 Sayre OK 9533 SOUTHWESTERN BELL 536      
580-928 2 Sayre OK 9533 SOUTHWESTERN BELL 536      
580-928 3 Sayre OK 9533 SOUTHWESTERN BELL 536      
580-928 4 Sayre OK 9533 SOUTHWESTERN BELL 536      
580-928 5 Sayre OK 9533 SOUTHWESTERN BELL 536      
580-928 8 Sayre OK 9533 SOUTHWESTERN BELL 536      
580-928 9 Sayre OK 9533 SOUTHWESTERN BELL 536      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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