This is a universally administered unicast address with a registered vendor prefix.
MAC address58:87:9F:7F:FF:FF
OUI58:87:9F
Vendor addressNo.2 of Xincheng Road, Songshan Lake Zone Dongguan Guangdong CN 523808
Block range58:87:9F:00:00:00– 58:87:9F: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-645A:87:9F:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::5a87:9fff: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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