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.NK2 File Extension

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File TypeOutlook 2002 Nickname File

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Rare Uncommon Average Common Very Common
CategoryMisc Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.


Contains the nickname for an Outlook user that is a associated with a user profile; allows a user to create a nickname and assign the name to an e-mail address.

More Information

Outlook 2002 and later uses NK2 files. Previous versions of Outlook use .NICK files.

Programs that open NK2 files
Microsoft Windows LogoWindows
Microsoft Outlook 2016
Updated 3/13/2008