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

NXX: 358

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-358 A Damascus MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-358 0 Damascus MD   073H TELNYX LLC 236   2019-12-01   
240-358 5 Damascus MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-358 9 Damascus MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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