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Microsoft KB Archive/254655

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Knowledge Base

Article ID: 254655

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Server 4.0 Standard Edition
  • Microsoft Windows NT Workstation 4.0 Developer Edition

This article was previously published under Q254655


If you have a DNS Domain suffix longer than 31 octets, and you use the Ipconfig tool with the /All switch, the suffix is not displayed.

For example, if you have the host name,, and you type ipconfig /all at a command prompt, and then press ENTER, the following text is displayed:

Host Name . . . . . . . . . : myhostname


This issue occurs because the length of the buffer that the Ipconfig tool uses to retrieve the Domain name suffix is too small.


A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English-language version of this fix should have the following file attributes or later:

   Date      Time    Size     File name     Platform
   26/02/00  00:20   21,776   ipconfig.exe  Intel
   26/02/00  00:20   32,528   ipconfig.exe  Alpha


To work around this issue, use the Winipcfg tool.


Microsoft has confirmed that this is a problem in Windows NT 4.0.

Keywords: kbhotfixserver kbqfe kbbug kbfix KB254655