This is a universally administered unicast address with a registered vendor prefix.
MAC addressE4:4C:C7:17:FF:FF
OUIE4:4C:C7
Vendor addressScience Park 2 Saarbrücken DE 66123
Block rangeE4:4C:C7:10:00:00– E4:4C:C7:1F:FF:FF
Address capacity1,048,576
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-64E6:4C:C7:FF:FE:17:FF:FF
Possible IPv6 link-local derivationfe80::e64c:c7ff:fe17: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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