D&B U.S. DMI Archive

Update – March 10, 2025: The 2024 annual file is now available!

D&B U.S. DMI Archive 

This service features access to D&B’s archive of year-end U.S. DUNS Marketing Identifier (DMI) files. These files represent D&B’s source for U.S. business-to-business marketing information at year-end from 1969 to present, excluding 1981 and 1984.

To request access, kindly use the provided Library Mediated Accounts Request Form. Please note that access to D&B Historical data is restricted solely for the purpose of personal academic research.

Supplementary documents: Product Brochure | File Layout | Data size: about 39 Terabytes in total

Once you have been granted access to the data, you can download it using one of two available options:

• Downloading from Globus
• Downloading from Research Workspace  project_name: db_nets | Instructions for mounting your drive.

Note: 

1. Data is available in compressed CSV format as zipped files (.gz). The size of each file can be found in the Data Summary
2. Data can be downloaded either from the Research Workspace or Globus. However, accessing data files in the cloud (without downloading) is only possible through the Research Workspace.
3. Important: The individual data file is large and may not be accessible directly by Microsoft Excel. Please consult the Sample Data for a quick overview, and utilize a suitable program. Python, R, to access the raw data.