This is a universally administered unicast address with a registered vendor prefix.
MAC addressA4:CF:D2:7F:FF:FF
OUIA4:CF:D2
Vendor addressFlat/RM 1202, 12/F, AT Tower, 180 Electric Road North Point HK 00000
Block rangeA4:CF:D2:00:00:00– A4:CF:D2: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-64A6:CF:D2:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::a6cf:d2ff: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.

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