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: LARLMDLR3MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-278 0 Washington Zone 5 MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-525 A Gaithersburg MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-525 0 Gaithersburg MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-685 8 Damascus MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-769 0 Leonardtown MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-803 5 Washington Zone 2 MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-885 4 Waldorf MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      
301-994 5 Lexington Park-Great Mills MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236      

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

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