This is a universally administered unicast address with a registered vendor prefix.
MAC address5C:5A:4C:87:FF:FF
OUI5C:5A:4C
Vendor address1350 Old Bayshore Hwy #920 Burlingame CA US 94010
Block range5C:5A:4C:80:00:00– 5C:5A:4C:8F: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-645E:5A:4C:FF:FE:87:FF:FF
Possible IPv6 link-local derivationfe80::5e5a:4cff:fe87: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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