The first 24 bits of a
network card's MAC address uniquely identify the network card's
vendor. This 24-bit number is called the OUI ("Organizationally
Unique Identifier"). The NIC Vendor Identifier is a tool that
allows you to look up a vendor name by MAC address. To look up a
vendor name, click Tools
Vendor Identifier, enter a MAC address, and
The vendor's name will be displayed. By default, CommView replaces
the first three octets of the MAC address by the adapter vendor
name in the Packets
behavior may be changed by unchecking the Display
vendor names in MAC addresses checkbox in the
program Options dialog.
The list of vendors is contained in the MACS.TXT file located
in the CommView application folder. You can manually edit this list
to add/modify information.