This is a universally administered unicast address with a registered vendor prefix.
MAC address10:63:A3:CF:FF:FF
OUI10:63:A3
Vendor addressMarch 8 str., 1, building 12, Room 2/49 Moscow RU 127083
Block range10:63:A3:C0:00:00– 10:63:A3: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-6412:63:A3:FF:FE:CF:FF:FF
Possible IPv6 link-local derivationfe80::1263:a3ff:fecf: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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