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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Switch: BLTMMD91DS2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-346 4 Silver Run MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-441 7 Elkton MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-452 4 Cardiff MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-525 7 Baltimore MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   
410-696 6 Ellicott City MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-19   
410-773 0 Cockeysville MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-776 0 Bel Air MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-871 4 Westminster MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-17   
410-940 0 Annapolis MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-946 0 Severna Park MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-970 8 Sykesville MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-982 A Baltimore MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238      
410-982 0 Baltimore MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-04   
443-507 4 Hampstead MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   
443-550 4 North Beach MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
443-583 2 Columbia MD 2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   

Last updated: Fri, 23 Jul 2021 12:43:22 UTC

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