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: TNKWOKMARS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
580-628 A Tonkawa OK 9533 SOUTHWESTERN BELL 536      
580-628 2 Tonkawa OK 9533 SOUTHWESTERN BELL 536      
580-628 3 Tonkawa OK 9533 SOUTHWESTERN BELL 536      
580-628 5 Tonkawa OK 9533 SOUTHWESTERN BELL 536      
580-628 6 Tonkawa OK 9533 SOUTHWESTERN BELL 536      
580-628 7 Tonkawa OK 9533 SOUTHWESTERN BELL 536      
580-628 9 Tonkawa OK 9533 SOUTHWESTERN BELL 536      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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