What this means
The IEEE assigned the MA-L block E0319E to Valve Corporation. 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 E0:31:9E, it is Valve Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix E0319E?
E0319E is registered to Valve Corporation 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. Valve Corporation's block covers 16,777,216 addresses.
What devices use E0319E?
Any network device with a MAC address starting E0:31:9E was manufactured by or for Valve Corporation.