What this means
The IEEE assigned the MA-L block 0006DD to AT & T Laboratories - Cambridge Ltd. 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 00:06:DD, it is AT & T Laboratories - Cambridge Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 0006DD?
0006DD is registered to AT & T Laboratories - Cambridge Ltd 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. AT & T Laboratories - Cambridge Ltd's block covers 16,777,216 addresses.
What devices use 0006DD?
Any network device with a MAC address starting 00:06:DD was manufactured by or for AT & T Laboratories - Cambridge Ltd.