What this means
The IEEE assigned the MA-M block 6431391 to Livongo Health. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 64:31:39:1, it is Livongo Health hardware.
Frequently Asked Questions
Who owns MAC prefix 6431391?
6431391 is registered to Livongo Health in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Livongo Health's block covers 1,048,576 addresses.
What devices use 6431391?
Any network device with a MAC address starting 64:31:39:1 was manufactured by or for Livongo Health.