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.

Switch: CHCHMDBEXCX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-237 8 Lexington Park-Great Mills MD 228C IDT AMERICA, CORP. - MD 236      
240-249 6 Mechanicsville MD 228C IDT AMERICA, CORP. - MD 236      
240-258 5 Ridge MD 228C IDT AMERICA, CORP. - MD 236      
240-309 4 Leonardtown MD 228C IDT AMERICA, CORP. - MD 236      
240-317 5 Lexington Park-Great Mills MD 228C IDT AMERICA, CORP. - MD 236      
240-661 5 Lexington Park-Great Mills MD 228C IDT AMERICA, CORP. - MD 236      
301-690 A Leonardtown MD 228C IDT AMERICA, CORP. - MD 236      
301-690 2 Leonardtown MD 228C IDT AMERICA, CORP. - MD 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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