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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Carolina, PR

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
939-845 4   8645 SUNCOM DBA T-MOBILE USA 820   2021-07-25   
939-845 5   8645 SUNCOM DBA T-MOBILE USA 820   2021-07-25   
939-845 6   559F NEUTRAL TANDEM - PR 820   2021-01-25   
939-845 7   8645 SUNCOM DBA T-MOBILE USA 820   2021-07-25   
939-845 8   091J LUMEN TECHNOLOGIES PUERTO RICO, LLC 820   2019-02-18   
939-845 9   8645 SUNCOM DBA T-MOBILE USA 820   2018-06-25   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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