What this means
The IEEE assigned the MA-L block E42805 to Pivotal Optics. 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 E4:28:05, it is Pivotal Optics hardware.
Frequently Asked Questions
Who owns MAC prefix E42805?
E42805 is registered to Pivotal Optics 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. Pivotal Optics's block covers 16,777,216 addresses.
What devices use E42805?
Any network device with a MAC address starting E4:28:05 was manufactured by or for Pivotal Optics.