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: NEPHUTMADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
435-623 A Nephi UT 9636 QWEST CORPORATION 660      
435-623 0 Nephi UT 9636 QWEST CORPORATION 660      
435-623 1 Nephi UT 9636 QWEST CORPORATION 660      
435-623 2 Nephi UT 9636 QWEST CORPORATION 660      
435-623 3 Nephi UT 9636 QWEST CORPORATION 660      
435-623 4 Nephi UT 9636 QWEST CORPORATION 660      
435-623 5 Nephi UT 9636 QWEST CORPORATION 660      
435-623 7 Nephi UT 9636 QWEST CORPORATION 660      
435-623 8 Nephi UT 9636 QWEST CORPORATION 660      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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