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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Switch: BLTQMD01EMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
667-463 A Darlington MD 598J FIVE9, INC. 238   2024-02-25   
667-463 0 Darlington MD 598J FIVE9, INC. 238   2024-02-25   

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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