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.

OCN: 008A MOUNTAINET TELEPHONE COMPANY - TN

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
423-256 5 Church Hill TN GTCYVA02AMD  956      
423-389 7 Midway (Sullivan) TN GTCYVA02AMD  956      
423-578 7 Kingsport TN GTCYVA02AMD  956      
423-579 1 Kingsport TN GTCYVA020MD  956      
423-979 8 Johnson City TN GTCYVA02AMD  956      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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