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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Monterey, VA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
540-468 A MTRYVAXADS0  0237 HIGHLAND TEL. COOP. 244      
540-648 A RONKVALKXJY  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 244      
540-648 2 RONKVALKXJY  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 244   2018-03-19   
540-648 9 WYBOVAXAW43  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 244   2022-01-17   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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