This is a universally administered unicast address with a registered vendor prefix.
MAC addressEC:74:CD:C0:00:00
OUIEC:74:CD
Vendor addressUnit 201-26, Luohu Business Center, No. 2028 Shennan East Road, Chengdong Community, Dongmen Street, Luohu District, Shenzhen Shenzhen CN 518001
Block rangeEC:74:CD:C0:00:00– EC:74:CD:CF: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-64EE:74:CD:FF:FE:C0:00:00
Possible IPv6 link-local derivationfe80::ee74:cdff:fec0:0

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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