What this means
The IEEE assigned the MA-L block E457A8 to Stuart Manufacturing, Inc.. 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 E4:57:A8, it is Stuart Manufacturing, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix E457A8?
E457A8 is registered to Stuart Manufacturing, Inc. 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. Stuart Manufacturing, Inc.'s block covers 16,777,216 addresses.
What devices use E457A8?
Any network device with a MAC address starting E4:57:A8 was manufactured by or for Stuart Manufacturing, Inc..