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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-212 A Sparks-Glencoe MD 2589 US LEC OF MARYLAND, INC. 238      
443-228 A Chase MD 2589 US LEC OF MARYLAND, INC. 238      
443-351 A Odenton MD 2589 US LEC OF MARYLAND, INC. 238      
443-372 A Edgewood MD 2589 US LEC OF MARYLAND, INC. 238      
443-452 A Baltimore MD 2589 US LEC OF MARYLAND, INC. 238   2005-10-30   
443-461 A Parkville MD 2589 US LEC OF MARYLAND, INC. 238      
443-470 A Towson MD 2589 US LEC OF MARYLAND, INC. 238      
443-471 A Pikesville MD 2589 US LEC OF MARYLAND, INC. 238      
443-481 A Annapolis MD 2589 US LEC OF MARYLAND, INC. 238      
443-514 A Catonsville MD 2589 US LEC OF MARYLAND, INC. 238      
443-539 A Columbia MD 2589 US LEC OF MARYLAND, INC. 238      
443-549 A Dundalk MD 2589 US LEC OF MARYLAND, INC. 238      
443-561 A Elkridge MD 2589 US LEC OF MARYLAND, INC. 238      
443-573 A Baltimore MD 2589 US LEC OF MARYLAND, INC. 238      
443-574 A Ellicott City MD 2589 US LEC OF MARYLAND, INC. 238      
443-577 A Glen Burnie MD 2589 US LEC OF MARYLAND, INC. 238      
443-579 A Essex MD 2589 US LEC OF MARYLAND, INC. 238      
443-589 A Cockeysville MD 2589 US LEC OF MARYLAND, INC. 238      
443-632 A Towson MD 2589 US LEC OF MARYLAND, INC. 238      
443-640 A Bel Air MD 2589 US LEC OF MARYLAND, INC. 238      
443-649 A Sparrows Point MD 2589 US LEC OF MARYLAND, INC. 238      
443-780 A Woodlawn MD 2589 US LEC OF MARYLAND, INC. 238      
443-833 A Arbutus MD 2589 US LEC OF MARYLAND, INC. 238      
443-837 A Annapolis MD 2589 US LEC OF MARYLAND, INC. 238      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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