What this means
The IEEE assigned the MA-M block 3873EA4 to Light Blue Optics Ltd.. 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 38:73:EA:4, it is Light Blue Optics Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 3873EA4?
3873EA4 is registered to Light Blue Optics Ltd. 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. Light Blue Optics Ltd.'s block covers 1,048,576 addresses.
What devices use 3873EA4?
Any network device with a MAC address starting 38:73:EA:4 was manufactured by or for Light Blue Optics Ltd..