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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 Outlook 2016
Updated 3/13/2008

FileInfo - The File Extensions Database

This page contains information about the .NK2 extension and its known file associations. Our goal is to help you understand what an NK2 file is and how to open it.

The Outlook 2002 Nickname file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and therefore do not publish any information we have not verified.

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