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: KNVLTNMA31Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
423-210 A Tellico Plains TN 6278 UNITED STATES CELLULAR - TN 474      
423-214 A Englewood TN 6278 UNITED STATES CELLULAR - TN 474      
423-248 A Newport TN 6278 UNITED STATES CELLULAR - TN 474      
423-259 A New Tazewell TN 6278 UNITED STATES CELLULAR - TN 474      
423-363 A Huntsville TN 6278 UNITED STATES CELLULAR - TN 474      
423-377 A La Follette TN 6278 UNITED STATES CELLULAR - TN 474      
423-519 A Tellico Plains TN 6278 UNITED STATES CELLULAR - TN 474      
423-572 A Englewood TN 6278 UNITED STATES CELLULAR - TN 474      
423-592 A La Follette TN 6278 UNITED STATES CELLULAR - TN 474      
423-701 A Robbins TN 6278 UNITED STATES CELLULAR - TN 474      
423-721 A Newport TN 6278 UNITED STATES CELLULAR - TN 474      
865-216 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-254 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-255 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-256 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-257 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-258 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-363 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-556 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-640 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-643 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-654 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-659 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-660 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-661 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-679 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-680 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      
865-705 A Knoxville TN 6278 UNITED STATES CELLULAR - TN 474      

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

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