What this means
The IEEE assigned the MA-L block E4F042 to Google, 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:F0:42, it is Google, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix E4F042?
E4F042 is registered to Google, 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. Google, Inc.'s block covers 16,777,216 addresses.
What devices use E4F042?
Any network device with a MAC address starting E4:F0:42 was manufactured by or for Google, Inc..