June Life Inc

Any device whose MAC address begins with C4:57:1F has a network interface built by June Life Inc. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

C4:57:1F

Organization

June Life Inc

Address

649 Front Street San Francisco CA US 94111

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.