Perl doesn't supply such a method built-in, but it's fairly easy to use the data supplied here to look up vendors by OUIs (the first 24 bits in the Ethernet MAC).
Comment on Re: How to get NIC Manufactorer on Unix
Good pointer—I think the best option for programmatic use is probably brian_d_foy's Net::MAC::Vendor, which appears to be a platform-independent Perl interface to that data.
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