What this means
The IEEE assigned the MA-M block A019B20 to Vast Production Services. 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 A0:19:B2:0, it is Vast Production Services hardware.
Frequently Asked Questions
Who owns MAC prefix A019B20?
A019B20 is registered to Vast Production Services 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. Vast Production Services's block covers 1,048,576 addresses.
What devices use A019B20?
Any network device with a MAC address starting A0:19:B2:0 was manufactured by or for Vast Production Services.