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: 488

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-488 A Salisbury MD SLBRMDXZ4MD  475J CALLWORKS CORPORATION 242   2024-07-11   
667-488 1 Salisbury MD SLBRMDXZ4MD  475J CALLWORKS CORPORATION 242   2024-07-11   
667-488 8 Salisbury MD   820C INTRADO COMMUNICATIONS, LLC 242   2026-10-15   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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