What this means
The IEEE assigned the MA-L block D89C8E to Comcast Cable 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 D8:9C:8E, it is Comcast Cable Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix D89C8E?
D89C8E is registered to Comcast Cable 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. Comcast Cable Corporation's block covers 16,777,216 addresses.
What devices use D89C8E?
Any network device with a MAC address starting D8:9C:8E was manufactured by or for Comcast Cable Corporation.