Eight Sleep

Any device whose MAC address begins with 70:B6:51 has a network interface built by Eight Sleep. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

70:B6:51

Organization

Eight Sleep

Address

212 W 35th St Floor 4 New York NY US 10123

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.