This is a universally administered unicast address with a registered vendor prefix.
MAC address54:91:AF:57:FF:FF
OUI54:91:AF
Vendor addressRoom 702, Building 1, JEJA Science park, Li Langping Li Avenue, Nanwan Street, Longgang District, Shenzhen Shenzhen CN 518000
Block range54:91:AF:50:00:00– 54:91:AF:5F: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-6456:91:AF:FF:FE:57:FF:FF
Possible IPv6 link-local derivationfe80::5691:afff:fe57: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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