This is a universally administered unicast address with a registered vendor prefix.
MAC addressAC:EF:92:27:FF:FF
OUIAC:EF:92
Vendor addressFloor9, Building2, No.588, Zi Xing Road, Minhang District, Shanghai, China Shanghai Shanghai CN 200241
Block rangeAC:EF:92:20:00:00– AC:EF:92:2F:FF:FF
Address capacity1,048,576
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:EF:92:FF:FE:27:FF:FF
Possible IPv6 link-local derivationfe80::aeef:92ff:fe27: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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