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: CHCYIATCRS2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
641-228 A Charles City IA 9631 QWEST CORPORATION 632      
641-228 1 Charles City IA 9631 QWEST CORPORATION 632      
641-228 2 Charles City IA 9631 QWEST CORPORATION 632      
641-228 3 Charles City IA 9631 QWEST CORPORATION 632      
641-228 4 Charles City IA 9631 QWEST CORPORATION 632      
641-228 5 Charles City IA 9631 QWEST CORPORATION 632      
641-228 6 Charles City IA 9631 QWEST CORPORATION 632      
641-228 7 Charles City IA 9631 QWEST CORPORATION 632      
641-228 8 Charles City IA 9631 QWEST CORPORATION 632      
641-228 9 Charles City IA 9631 QWEST CORPORATION 632      
641-257 A Charles City IA 9631 QWEST CORPORATION 632      
641-257 0 Charles City IA 9631 QWEST CORPORATION 632      
641-257 1 Charles City IA 9631 QWEST CORPORATION 632      
641-257 2 Charles City IA 9631 QWEST CORPORATION 632      
641-257 3 Charles City IA 9631 QWEST CORPORATION 632      
641-257 4 Charles City IA 9631 QWEST CORPORATION 632      
641-257 5 Charles City IA 9631 QWEST CORPORATION 632      
641-257 6 Charles City IA 9631 QWEST CORPORATION 632      

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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