This is a universally administered unicast address with a registered vendor prefix.
MAC address00:40:DF:FF:FF:FF
OUI00:40:DF
Vendor address3180 SOUTH 166TH STREET NEW BERLIN WI US 53151
Block range00:40:DF:00:00:00– 00:40:DF: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-6402:40:DF:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::240:dfff: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.

Have a list, not just one address? Paste it and extract every MAC address in it →

New to MAC addresses? What they are and how they're structured →