What this means
The IEEE assigned the MA-L block 58B9E1 to Crystalfontz America, 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 58:B9:E1, it is Crystalfontz America, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 58B9E1?
58B9E1 is registered to Crystalfontz America, 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. Crystalfontz America, Inc.'s block covers 16,777,216 addresses.
What devices use 58B9E1?
Any network device with a MAC address starting 58:B9:E1 was manufactured by or for Crystalfontz America, Inc..