What this means
The IEEE assigned the MA-M block EC74CD4 to Vialis BV. 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 EC:74:CD:4, it is Vialis BV hardware.
Frequently Asked Questions
Who owns MAC prefix EC74CD4?
EC74CD4 is registered to Vialis BV 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. Vialis BV's block covers 1,048,576 addresses.
What devices use EC74CD4?
Any network device with a MAC address starting EC:74:CD:4 was manufactured by or for Vialis BV.