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: PHNXOR55DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
541-512 A Phoenix OR 9638 QWEST CORPORATION 670      
541-512 0 Phoenix OR 9638 QWEST CORPORATION 670      
541-512 1 Phoenix OR 9638 QWEST CORPORATION 670      
541-512 2 Phoenix OR 9638 QWEST CORPORATION 670      
541-512 3 Phoenix OR 9638 QWEST CORPORATION 670      
541-512 8 Phoenix OR 9638 QWEST CORPORATION 670      
541-512 9 Phoenix OR 9638 QWEST CORPORATION 670      
541-535 A Phoenix OR 9638 QWEST CORPORATION 670      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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