This is a universally administered unicast address with a registered vendor prefix.
MAC address78:8D:F7:7F:FF:FF
OUI78:8D:F7
Vendor addressNo. 1-8, Lising 1st Rd. Hsinchu Science Park, Hsinchu, 300, Taiwan, R.O.C Hsin-chu Taiwan TW 300
Block range78:8D:F7:00:00:00– 78:8D:F7: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-647A:8D:F7:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::7a8d:f7ff: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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