The documentation talks about running the module as a script:
You can also run this as a script with as many arguments as you like.
The module realizes it is a script, looks up the information for each
MAC, and outputs it.
perl Net/Mac/Vendor.pm 00:0d:93:29:f6:c2 00:0d:93:29:f6:c5
That last line should read:
perl Net/MAC/Vendor.pm 00:0d:93:29:f6:c2 00:0d:93:29:f6:c5
^^^
Yes, I was bitten by this :)
Thanks,
David