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: SLKCUTMAX9Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
385-261 A Salt Lake City UT 508J CENTURYLINK COMMUNICATIONS, LLC 660      
385-264 A Ogden UT 508J CENTURYLINK COMMUNICATIONS, LLC 660      
385-278 A Kaysville UT 508J CENTURYLINK COMMUNICATIONS, LLC 660      
385-484 A Lehi UT 508J CENTURYLINK COMMUNICATIONS, LLC 660      
385-522 A Salt Lake City UT 508J CENTURYLINK COMMUNICATIONS, LLC 660      
435-522 A St George UT 508J CENTURYLINK COMMUNICATIONS, LLC 660      
801-646 A Salt Lake City UT 508J CENTURYLINK COMMUNICATIONS, LLC 660      

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

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