This is a universally administered unicast address with a registered vendor prefix.
MAC addressDC:4B:A1:00:00:00
OUIDC:4B:A1
Vendor addressNo.20,Park Avenue II,Hsinchu Science Park Hsin-Chu R.O.C. TW 308
Block rangeDC:4B:A1:00:00:00– DC:4B:A1: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-64DE:4B:A1:FF:FE:00:00:00
Possible IPv6 link-local derivationfe80::de4b:a1ff:fe00:0

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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