This is a universally administered unicast address with a registered vendor prefix.
MAC addressAC:39:71:FF:FF:FF
OUIAC:39:71
Vendor addressNo.178 Yulong Avenue, Yufengshan, Yubei District, Chongqing. Chongqing China CN 401120
Block rangeAC:39:71:00:00:00– AC:39:71:FF:FF:FF
Address capacity16,777,216
TransmissionUnicast: addressed to a single device
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
RandomizationNot randomized
Derived modified EUI-64AE:39:71:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::ae39:71ff:feff: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.

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