nbtscan

Network Mapping -> Identify Live Hosts -> nbtscan

nbtscan is capable of scanning IP ranges for NETBIOS names. It sends a NETBIOS status query to all IPs in the range, and lists the results.

nbtscan [-v] [-d] [-e] [-l] [-t timeout] [-b bandwidth] [-r] [-q] [-s separator]
 [-m retransmits] (-f filename)|(<scan_range>)
        -v              verbose output. Print all names received
                        from each host
        -d              dump packets. Print whole packet contents.
        -e              Format output in /etc/hosts format.
        -l              Format output in lmhosts format.
                        Cannot be used with -v, -s or -h options.
        -t timeout      wait timeout milliseconds for response.
                        Default 1000.
        -b bandwidth    Output throttling. Slow down output
                        so that it uses no more that bandwidth bps.
                        Useful on slow links, so that ougoing queries
                        don't get dropped.
        -r              use local port 137 for scans. Win95 boxes
                        respond to this only.
                        You need to be root to use this option on Unix.
        -q              Suppress banners and error messages,
        -s separator    Script-friendly output. Don't print
                        column and record headers, separate fields with separator.
        -h              Print human-readable names for services.
                        Can only be used with -v option.
        -m retransmits  Number of retransmits. Default 0.
        -f filename     Take IP addresses to scan from file filename.
                        -f - makes nbtscan take IP addresses from stdin.
        <scan_range>    what to scan. Can either be single IP
                        like 192.168.1.1 or
                        range of addresses in one of two forms:
                        xxx.xxx.xxx.xxx/xx or xxx.xxx.xxx.xxx-xxx.
Examples:
        nbtscan -r 192.168.1.0/24
                Scans the whole C-class network.
        nbtscan 192.168.1.25-137
                Scans a range from 192.168.1.25 to 192.168.1.137
        nbtscan -v -s : 192.168.1.0/24
                Scans C-class network. Prints results in script-friendly
                format using colon as field separator.
                Produces output like that:
                192.168.0.1:NT_SERVER:00U
                192.168.0.1:MY_DOMAIN:00G
                192.168.0.1:ADMINISTRATOR:03U
                192.168.0.2:OTHER_BOX:00U
                ...
        nbtscan -f iplist
                Scans IP addresses specified in file iplist.
root@bt:~# nbtscan 192.168.1.0/24
Doing NBT name scan for addresses from 192.168.1.0/24

IP address       NetBIOS Name     Server    User             MAC address
------------------------------------------------------------------------------
192.168.1.0     Sendto failed: Permission denied
192.168.1.1      NETGEARUSB       <server>  NETGEARUSB       00:00:00:00:00:00
192.168.1.5      OTTHON-BEA       <server>  BEA              00:50:8d:xx:xx:xx
192.168.1.11     HOME-CSABI                 <unknown>        00:1c:25:xx:xx:xx
192.168.1.255   Sendto failed: Permission denied
root@bt:~#
root@bt:~# nbtscan -s : 192.168.1.0/24
192.168.1.0     Sendto failed: Permission denied
192.168.1.5:OTTHON-BEA     :<server>:BEA            :00:50:8d:xx:xx:xx
192.168.1.1:NETGEARUSB     :<server>:NETGEARUSB     :00:00:00:00:00:00
192.168.1.11:HOME-CSABI     ::<unknown>:00:1c:25:xx:xx:xx
192.168.1.255   Sendto failed: Permission denied
 

Official website: http://www.unixwiz.net/tools/nbtscan.html