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# Valid TCP/IP Host Names (as Specified by RFC 952)

Article ID: 101785

Article Last Modified on 2/20/2007

APPLIES TO

- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional Edition
- Microsoft Windows NT Advanced Server 3.1
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows NT Workstation 3.1
- Microsoft Windows NT Workstation 3.5
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Advanced Server 3.1

This article was previously published under Q101785
TCP/IP host names are limited to a more restrictive set of characters than computer names. The following characters are valid:

       0...9
       a...z
       A...Z
       .
       - (hyphen, not underscore)

Note: Your computer name does not have to be the same as your host name. By default, TCP/IP setup will set your host name to your computer name, replacing illegal characters with a hyphen (-).

Additional query words: prodnt

Keywords: kbnetwork KB101785