This is a universally administered unicast address with a registered vendor prefix.
MAC address74:3A:EF:00:00:00
OUI74:3A:EF
Vendor address884-3, Seongnam-daero, Bundang-gu Seongnam-si Gyeonggi-do KR 13517
Block range74:3A:EF:00:00:00– 74:3A:EF: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-6476:3A:EF:FF:FE:00:00:00
Possible IPv6 link-local derivationfe80::763a:efff: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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