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: JHCYTNXCXIY

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
423-946 0 Johnson City TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2005-12-05   
423-946 2 Johnson City TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2006-04-02   
423-946 3 Johnson City TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2006-07-03   
423-946 5 Johnson City TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2006-10-08   
423-948 5 Limestone TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2009-08-31   
423-948 7 Limestone TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2012-08-24   
423-956 A Bristol TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956      
423-963 0 Kingsport TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2004-10-08   
423-972 1 Greeneville TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2005-09-09   
423-972 2 Greeneville TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2005-12-05   
423-972 3 Greeneville TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2006-03-10   
423-972 5 Greeneville TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2006-06-11   
423-972 7 Greeneville TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2006-09-04   
423-972 8 Greeneville TN 6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2006-11-16   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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