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: 430H MRSTWN UT COMM DBA MRSTWN UT SYS FIBERNET - TN

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
423-616 A Morristown TN MRTWTNCKDS0  474      
423-616 0 Morristown TN MRTWTNCKDS0  474   2014-10-17   
423-720 9 Newport TN MRTWTNCKDS0  474   2017-12-02   
865-413 9 Chestnut Hill TN MRTWTNCKDS0  474   2018-04-18   
865-505 4 Sevierville TN MRTWTNCKDS0  474   2019-03-15   

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

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