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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OCN: 939H COMMIO, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
667-403 6 Towson MD BLTQMD013MD  238   2021-11-01   
667-403 7 Towson MD BLTQMD013MD  238   2021-11-01   
667-403 8 Towson MD BLTQMD013MD  238   2021-11-01   
667-403 9 Towson MD BLTQMD013MD  238   2021-11-01   
667-404 1 Prince Frederick MD BLTQMD013MD  238   2022-11-24   
667-449 A Preston MD SLBRMD901MD  242      
667-449 0 Preston MD SLBRMD901MD  242   2023-11-04   
667-449 1 Preston MD SLBRMD901MD  242   2023-11-04   
667-449 2 Preston MD SLBRMD901MD  242   2023-11-04   
667-449 3 Preston MD SLBRMD901MD  242   2023-11-04   
667-449 4 Preston MD SLBRMD901MD  242   2023-11-04   
667-454 6 Bel Air MD BLTQMD013MD  238   2023-12-28   
667-454 7 Bel Air MD BLTQMD013MD  238   2023-12-28   
667-454 8 Bel Air MD BLTQMD013MD  238   2023-12-28   
667-456 0 Dundalk MD BLTQMD013MD  238   2024-01-09   
667-456 1 Dundalk MD BLTQMD013MD  238   2024-01-09   
667-456 2 Dundalk MD BLTQMD013MD  238   2024-01-09   
667-456 3 Dundalk MD BLTQMD013MD  238   2024-01-09   
667-457 A Church Hill MD SLBRMD901MD  242   2024-01-25   
667-457 0 Church Hill MD SLBRMD901MD  242   2024-01-25   
667-457 1 Church Hill MD SLBRMD901MD  242   2024-01-25   
667-457 2 Church Hill MD SLBRMD901MD  242   2024-01-25   
667-457 3 Church Hill MD SLBRMD901MD  242   2024-01-25   
667-457 4 Church Hill MD SLBRMD901MD  242   2024-01-25   
667-459 A Oxford MD SLBRMD901MD  242   2024-01-25   
667-459 0 Oxford MD SLBRMD901MD  242   2024-01-25   
667-459 1 Oxford MD SLBRMD901MD  242   2024-01-25   
667-459 2 Oxford MD SLBRMD901MD  242   2024-01-25   
667-459 3 Oxford MD SLBRMD901MD  242   2024-01-25   
667-459 4 Oxford MD SLBRMD901MD  242   2024-01-25   
667-467 0 Denton MD SLBRMD901MD  242   2022-11-07   
667-566 A Stevensville MD SLBRMDXZ0MD  242      
667-566 6 Stevensville MD SLBRMDXZ0MD  242   2022-11-18   
667-566 8 Stevensville MD SLBRMD901MD  242   2023-12-21   
667-566 9 Stevensville MD SLBRMD901MD  242   2023-12-21   
667-663 0 Ocean City MD SLBRMD901MD  242   2022-11-07   
667-664 0 Trappe MD SLBRMD901MD  242   2022-11-07   
667-678 6 Columbia MD BLTQMD013MD  238   2021-10-16   
667-678 7 Columbia MD BLTQMD013MD  238   2021-10-16   
667-678 8 Columbia MD BLTQMD013MD  238   2021-10-16   
667-678 9 Columbia MD BLTQMD013MD  238   2021-10-16   
667-687 0 Warwick MD SLBRMD901MD  242   2022-03-27   
667-802 8 Catonsville MD BLTQMD013MD  238   2016-05-31   
667-827 0 Berlin MD SLBRMD901MD  242   2022-08-21   
667-867 A Baltimore MD BLTQMD013MD  238      
667-867 5 Baltimore MD BLTQMD013MD  238   2017-08-11   
667-877 A Pikesville MD BLTMMDSNFMD  238      
667-877 7 Pikesville MD BLTMMDSNFMD  238   2022-11-18   
669-301 1 San Jose: South DA CA SNJUCACL4MD  722   2021-06-20   
669-314 2 Sunnyvale CA SNJUCACL4MD  722   2024-01-28   

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

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