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<html><head><title>NetBIOS Hex Codes</title></head>
<body bgcolor="#FFFFFF">
<h2>NetBIOS Hex Codes</h2>
The NetBIOS naming convention allows for 16 characters in a NetBIOS name.
Microsoft, however, limits NetBIOS names to 15 characters and uses the
16th character as a NetBIOS suffix.
<p>All NetBIOS names are 16 characters in length. A NetBIOS suffix is the
16th character of the 16-character NetBIOS name. The NetBIOS suffix is
used by Microsoft Networking software to identify functionality installed
on the registered device.
<p>The following table lists the NetBIOS suffixes that are used by Microsoft
Windows NT. The suffixes are listed in hexadecimal format because many of
them are unprintable otherwise.
<blockquote><pre>
Name Number(h) Type Usage
--------------------------------------------------------------------------
<computername> 00 U Workstation Service
<computername> 01 U Messenger Service
<\\--__MSBROWSE__> 01 G Master Browser
<computername> 03 U Messenger Service
<computername> 06 U RAS Server Service
<computername> 1F U NetDDE Service
<computername> 20 U File Server Service
<computername> 21 U RAS Client Service
<computername> 22 U Microsoft Exchange Interchange(MSMail
Connector)
<computername> 23 U Microsoft Exchange Store
<computername> 24 U Microsoft Exchange Directory
<computername> 30 U Modem Sharing Server Service
<computername> 31 U Modem Sharing Client Service
<computername> 43 U SMS Clients Remote Control
<computername> 44 U SMS Administrators Remote Control
Tool
<computername> 45 U SMS Clients Remote Chat
<computername> 46 U SMS Clients Remote Transfer
<computername> 4C U DEC Pathworks TCPIP service on
Windows NT
<computername> 52 U DEC Pathworks TCPIP service on
Windows NT
<computername> 87 U Microsoft Exchange MTA
<computername> 6A U Microsoft Exchange IMC
<computername> BE U Network Monitor Agent
<computername> BF U Network Monitor Application
<username> 03 U Messenger Service
<domain> 00 G Domain Name
<domain> 1B U Domain Master Browser
<domain> 1C G Domain Controllers
<domain> 1D U Master Browser
<domain> 1E G Browser Service Elections
<INet~Services> 1C G IIS
<IS~computer name> 00 U IIS
<computername> [2B] U Lotus Notes Server Service
IRISMULTICAST [2F] G Lotus Notes
IRISNAMESERVER [33] G Lotus Notes
Forte_$ND800ZA [20] U DCA IrmaLan Gateway Server Service
</pre></blockquote>
<p>NetBIOS name types describe the functionality of the registration.
<p>Unique (U): The name may have only one IP address assigned to it. On a
network device multiple occurrences of a single name may appear to be
registered. The suffix may be the only unique character in the name.
<p>Group (G): A normal group; the single name may exist with many IP
addresses. WINS responds to a name query on a group name with the limited
broadcast address (255.255.255.255). Because routers block the
transmission of these addresses, the Internet Group was designed to
service communications between subnets.
<p>Multihomed (M): The name is unique, but due to multiple network interfaces
on the same computer this configuration is necessary to permit the
registration. The maximum number of addresses is 25.
<p>Internet Group (I): This is a special configuration of the group name used
to manage Windows NT Domain names.
<p>Domain Name (D): New in Windows NT 4.0.
<p>For additional information, please see the following article in the
Microsoft Knowledge Base:
<blockquote><pre>
ARTICLE-ID: Q119495
TITLE : List of Names Registered with WINS Service
ARTICLE-ID: Q154608
TITLE : NETBIOS Node Status Query Returns First Instance of Unique
Name
ARTICLE-ID: Q129603
TITLE : Using Systems Management Server Remote Control over a RAS
Server
Additional query words: nbtstat netbeui browse browsing limitation length
======================================================================
Keywords : msnets kbnetwork
Version : 3.5 3.51 4.0
Platform : winnt
======================================================================
</pre></blockquote>
Copyright Microsoft Corporation 1998.
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