This is a universally administered unicast address with a registered vendor prefix.
MAC address98:4C:D3:7F:FF:FF
OUI98:4C:D3
Vendor address2 Goodson Industrial Mews Thame Oxfordshire GB OX9 3BX
Block range98:4C:D3:00:00:00– 98:4C:D3: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-649A:4C:D3:FF:FE:7F:FF:FF
Possible IPv6 link-local derivationfe80::9a4c:d3ff: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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