What this means
The IEEE assigned the MA-M block B437D1E to Union Tecnologica Noxium S.L.. 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 B4:37:D1:E, it is Union Tecnologica Noxium S.L. hardware.
Frequently Asked Questions
Who owns MAC prefix B437D1E?
B437D1E is registered to Union Tecnologica Noxium S.L. 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. Union Tecnologica Noxium S.L.'s block covers 1,048,576 addresses.
What devices use B437D1E?
Any network device with a MAC address starting B4:37:D1:E was manufactured by or for Union Tecnologica Noxium S.L..