This is a universally administered unicast address with a registered vendor prefix.
MAC address6C:D3:EE:FF:FF:FF
OUI6C:D3:EE
Vendor addressRoom A913, 159 Chengjiang Road Jiangyin City Jiangsu Province CN 214400
Block range6C:D3:EE:00:00:00– 6C:D3:EE: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-646E:D3:EE:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::6ed3:eeff: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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