While the NetBIOS specification allows names up to 16 characters, Microsoft's implementation limits names to 15 characters. Microsoft uses the 16th character as a NetBIOS code, also referred to as a NetBIOS suffix.
A host participating in a Microsoft Network typically will have multiple NetBIOS names, each with the same name but with different suffixes. The different NetBIOS suffixes identify different functions running on the host. For example, an NT server will have a NetBIOS name with a 00 suffix (workstation service) and another with a 20 suffix (file server service). The various NetBIOS names associated with the NT server identify what types of services are available on that machine.
|
Name |
Number (HEX) |
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 |
Exchange Interchange |
|
<computername> |
23 |
U |
Exchange Store |
|
<computername> |
24 |
U |
Exchange Directory |
|
<computername> |
30 |
U |
Modem Sharing Server Service |
|
<computername> |
31 |
U |
Modem Sharing Client Service |
|
<computername> |
43 |
U |
SMS Client Remote Control |
|
<computername> |
44 |
U |
SMS Admin Remote Control Tool |
|
<computername> |
45 |
U |
SMS Client Remote Chat |
|
<computername> |
46 |
U |
SMS Client Remote Transfer |
|
<computername> |
4C |
U |
DEC Pathworks TCPIP Service |
|
<computername> |
52 |
U |
DEC Pathworks TCPIP Service |
|
<computername> |
87 |
U |
Exchange MTA |
|
<computername> |
6A |
U |
Exchange IMC |
|
<computername> |
BE |
U |
Network Monitor Agent |
|
<computername> |
BF |
U |
Network Monitor Apps |
|
<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 |
Internet Information Server |
|
<IS~Computer_name> |
00 |
U |
Internet Information Server |
|
<computername> |
[2B] |
U |
Lotus Notes Server |
|
IRISMULTICAST |
[2F] |
G |
Lotus Notes |
|
IRISNAMESERVER |
[33] |
G |
Lotus Notes |
|
Forte_$ND800ZA |
[20] |
U |
DCA Irmalan Gateway Service |
Unique (U): The name may have only one IP address assigned to it. On a network device, multiple occurences of a single name may appear to be registered, but the suffix will be unique, making the entire name unique.
Group (G): A normal group; the single name may exist with many IP addresses.
Multihomed (M): The name is unique, but due to multiple network interfaces on the same computer, this configuration is necessary to permit the registration. Maximum number of addresses is 25.
Internet Group (I): This is a special configuration of the group name used to manage WinNT domain names.
Domain Name (D): New in NT 4.