What is DSN? What Opens a DSN? File Format List from WhatIs.com

File Extension

DSN File Format

ODBC Data source


DSN (Database Source Name) is the extension attached to files used by database client software to connect, via an ODBC (Open Database Connectivity) driver, to a database. The DSN file typically provides the data source name and directory, the server address, user ID and password, and other information. DSN files often store that data as plain text, although they may also store it in the system registry.

The DSN extension is also used with an OrCAD schematic capture file, a SureThing Office Labeler document, a Surfcam file, a CD Stomper Pro file, an ISIS Schematic Capture schematic file, and an Object System Designer design file.

MIME type: application/x-altiadsn

Learn more: 

See questions and answers about ODBC on IT Knowledge Exchange.

Carol Francum explains accessing an ODBC data source.

Learn more about ODBC.

This was last updated in September 2010
Editorial Director Margaret Rouse

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