This is a universally administered unicast address with a registered vendor prefix.
MAC address04:55:CA:7F:FF:FF
OUI04:55:CA
Vendor addressNO.1998 West of Fangshan Road,Xiang An Branch,Torch Hi-tech lndustrial Development Zone, Xiamen city Fujian Province CN 361102
Block range04:55:CA:00:00:00– 04:55:CA: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-6406:55:CA:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::655:caff:fe7f: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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