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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 371

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-371 A Washington Zone 12 MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-371 0 Washington Zone 12 MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-371 1 Washington Zone 12 MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-371 9 Washington Zone 12 MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236      

Last updated: Sat, 31 Oct 2020 19:28:10 UTC

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