This is a universally administered unicast address with a registered vendor prefix.
MAC address68:21:5F:FF:FF:FF
OUI68:21:5F
Vendor address1 Creation RD 3. Hsinchu TW 30077
Block range68:21:5F:00:00:00– 68:21:5F: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-646A:21:5F:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::6a21:5fff: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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