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: BLTMMDSNDS6

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-930 5 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2011-06-17   
443-951 5 Annapolis MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2008-07-27   
443-951 8 Annapolis MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2008-07-27   
443-951 9 Annapolis MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-08-20   
443-982 A Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238      
443-982 0 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 1 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 2 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 3 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 4 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 5 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 6 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 7 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 8 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   
443-982 9 Baltimore MD 281E YMAX COMMUNICATIONS CORP. - MD 238   2007-07-14   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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