This is a locally administered address in the IEEE 802c ELI (Extended Local Identifier) quadrant, whose company ID is registered to a real organization. The vendor identity can be trusted even though the address itself is not universally administered.
MAC address3A:76:5D:FF:FF:FF
OUI3A:76:5D
Vendor addressRoom 802, Floor 8, Building 8, Four District, East Tower, Wangjing, Chaoyang Beijing CN 100102
Country🇨🇳 China
Block range3A:76:5D:00:00:00– 3A:76:5D:FF:FF:FF
Address capacity16,777,216
TransmissionUnicast: addressed to a single device
AdministrationLocally administered: set by software, not burned into hardware
IEEE 802c quadrantELI: Extended Local Identifier
RandomizationLikely randomized
Derived modified EUI-6438:76:5D:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::3876:5dff: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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