What this means
The IEEE assigned the MA-L block 18D5B6 to SMG Holdings LLC. 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 18:D5:B6, it is SMG Holdings LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 18D5B6?
18D5B6 is registered to SMG Holdings LLC in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. SMG Holdings LLC's block covers 16,777,216 addresses.
What devices use 18D5B6?
Any network device with a MAC address starting 18:D5:B6 was manufactured by or for SMG Holdings LLC.