This is a locally administered address in the IEEE 802c ELI (Extended Local Identifier) quadrant, whose company ID is registered to a real organization. The vendor identity can be trusted even though the address itself is not universally administered.
MAC addressBA:67:91:7F:FF:FF
OUIBA:67:91
Vendor addressEPFL Innovation Park Lausanne Vaud CH 1015
Block rangeBA:67:91:00:00:00– BA:67:91:FF:FF:FF
Address capacity16,777,216
TransmissionUnicast: addressed to a single device
AdministrationLocally administered: set by software, not burned into hardware
IEEE 802c quadrantELI: Extended Local Identifier
RandomizationLikely randomized
Derived modified EUI-64B8:67:91:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::b867:91ff:fe7f:ffff

The EUI-64 and IPv6 link-local fields are a mathematical derivation from this MAC address. They don't confirm the device currently uses that IPv6 address.

Have a list, not just one address? Paste it and extract every MAC address in it →

New to MAC addresses? What they are and how they're structured →