What this means
The IEEE assigned the MA-L block DCE55B 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 DC:E5:5B, it is Google, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix DCE55B?
DCE55B 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 DCE55B?
Any network device with a MAC address starting DC:E5:5B was manufactured by or for Google, Inc..