What this means
The IEEE assigned the MA-L block 001857 to Unilever R&D. 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 00:18:57, it is Unilever R&D hardware.
Frequently Asked Questions
Who owns MAC prefix 001857?
001857 is registered to Unilever R&D 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. Unilever R&D's block covers 16,777,216 addresses.
What devices use 001857?
Any network device with a MAC address starting 00:18:57 was manufactured by or for Unilever R&D.