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Online Verification of Maryland Tax Account Numbers

Direct Pay Permits:

Unnumbered accounts
  • Exelon Corporation (including following subsidiaries)
      Baltimore Gas & Electric Company ("BGE")

  • Constellation Energy Generation, LLC (including the following subsidiaries)
      Constellation Power Source Generation, Inc.
      Calvert Cliffs Nuclear Power Plant, LLC

  • Potomac Edison Company
  • Potomac Electric Power Company
  • Washington Gas Light Company

Numbered accounts

    1)    Northrop Grumman Systems Corporation
    2)    Transcontinental Gas Pipe Line Corporation
    3)    SAIC - Frederick
    8)    Mack Trucks, Inc.
    14)   RG Steel Sparrows Point, LLC
    17)   Delmarva Power & Light Company
    18)   Norfolk Southern Railway
    19)   CSX Transportation Inc.
    20)   General Motors LLC. (including following subsidiaries)
      Truck Group-Baltimore
      Allison Transmission Division
    21)   Cristal USA, Inc.
    23)   W.L. Gore and Associates, Inc.
    24)   Human Genome Sciences, Inc.
    25)   MedImmune, LLC.(including following affiliate)
      MedImmune Biologics, Inc.

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