What this means
The IEEE assigned the MA-L block EC59E7 to Microsoft 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 EC:59:E7, it is Microsoft Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix EC59E7?
EC59E7 is registered to Microsoft 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. Microsoft Corporation's block covers 16,777,216 addresses.
What devices use EC59E7?
Any network device with a MAC address starting EC:59:E7 was manufactured by or for Microsoft Corporation.