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.
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Estill Springs, TN

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
931-351 A NSVLTNMTYJZ  318J COMCAST IP PHONE, LLC 470      
931-351 0 LBNNTN070MD  704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 470   2018-08-13   
931-351 2 NSVLTNMTYJZ  318J COMCAST IP PHONE, LLC 470   2016-05-13   
931-649 A CPHLTNXADS2  0581 UNITED TELEPHONE COMPANY DBA UNITED COMMUNICATIONS 470      

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

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