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: PHNDAZLS0MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
623-888 5 Phoenix AZ 7184 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - AZ 666   2012-10-11   
928-415 5 Wickenburg AZ 7184 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - AZ 666   2013-02-03   

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Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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