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 addressCA:F2:5B:FF:FF:FF
OUICA:F2:5B
Vendor addressRoom EF, 5F, Building 1, Financial Base, No.8 Kefa Road, High-Tech Park, Shenzhen, China Shenzhen Guangdong CN 518000
Country🇨🇳 China
Block rangeCA:F2:5B:00:00:00– CA:F2:5B: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-64C8:F2:5B:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::c8f2:5bff: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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