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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NPA: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 463

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-463 A Darlington MD BLTQMD01EMD  598J FIVE9, INC. 238   2024-02-25   
667-463 0 Darlington MD BLTQMD01EMD  598J FIVE9, INC. 238   2024-02-25   
667-463 9 Darlington MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2024-06-20   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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