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: TULSOKTERSC

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
918-292 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-831 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-832 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-833 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-834 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-835 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-836 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-838 A Tulsa OK 9533 SOUTHWESTERN BELL 538      
918-939 A Tulsa OK 9533 SOUTHWESTERN BELL 538      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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