This is a universally administered unicast address with a registered vendor prefix.
MAC address40:45:C4:7F:FF:FF
OUI40:45:C4
Vendor addressNo.2 Xin Cheng Road, Room R6,Songshan Lake Technology Park Dongguan CN 523808
Block range40:45:C4:00:00:00– 40:45:C4: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-6442:45:C4:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::4245:c4ff: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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