What this means
The IEEE assigned the MA-L block EC1766 to Research Centre Module. 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:17:66, it is Research Centre Module hardware.
Frequently Asked Questions
Who owns MAC prefix EC1766?
EC1766 is registered to Research Centre Module 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. Research Centre Module's block covers 16,777,216 addresses.
What devices use EC1766?
Any network device with a MAC address starting EC:17:66 was manufactured by or for Research Centre Module.