This is a universally administered unicast address with a registered vendor prefix.
MAC address34:87:3D:FF:FF:FF
OUI34:87:3D
Vendor addressRM501,Building 13,No.99 TianZhou Road,Xuhui District,Shanghai,China Shanghai Shanghai CN 200233
Block range34:87:3D:00:00:00– 34:87:3D: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-6436:87:3D:FF:FE:FF:FF:FF
Possible IPv6 link-local derivationfe80::3687:3dff: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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