What this means
The IEEE assigned the MA-S block 8C1F64383 to Urbidermis, S.L. (VAT ESB66435017). 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 8C:1F:64:38:3, it is Urbidermis, S.L. (VAT ESB66435017) hardware.
Frequently Asked Questions
Who owns MAC prefix 8C1F64383?
8C1F64383 is registered to Urbidermis, S.L. (VAT ESB66435017) in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Urbidermis, S.L. (VAT ESB66435017)'s block covers 4,096 addresses.
What devices use 8C1F64383?
Any network device with a MAC address starting 8C:1F:64:38:3 was manufactured by or for Urbidermis, S.L. (VAT ESB66435017).