What this means
The IEEE assigned the MA-L block E09B27 to Ciena 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 E0:9B:27, it is Ciena Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix E09B27?
E09B27 is registered to Ciena 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. Ciena Corporation's block covers 16,777,216 addresses.
What devices use E09B27?
Any network device with a MAC address starting E0:9B:27 was manufactured by or for Ciena Corporation.