This is a universally administered unicast address with a registered vendor prefix.
MAC address48:21:B8:7F:FF:FF
OUI48:21:B8
Vendor address13/F, Building 1, No.13 Bohua 4th Road, Huangpu District Guangzhou Guangdong CN 510663
Block range48:21:B8:00:00:00– 48:21:B8: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-644A:21:B8:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::4a21:b8ff: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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