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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: NRMNOKMADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
405-217 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-292 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-307 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-321 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-329 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-360 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-364 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-366 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-447 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-573 A Norman OK 9533 SOUTHWESTERN BELL 536      
405-579 A Norman OK 9533 SOUTHWESTERN BELL 536      

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

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