This is a universally administered unicast address with a registered vendor prefix.
MAC addressEC:46:2C:FF:FF:FF
OUIEC:46:2C
Vendor addressRMS 05-15, 13A/F SOUTH TOWER WORLD FINANCE CTR HARBOUR CITY 17 CANTON RD TST KLN HONG KONG HongKong HongKong HK 999077
Block rangeEC:46:2C:00:00:00– EC:46:2C: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-64EE:46:2C:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::ee46:2cff:feff: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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