What this means
The IEEE assigned the MA-L block 0005AD to Topspin Communications, Inc.. 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 00:05:AD, it is Topspin Communications, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 0005AD?
0005AD is registered to Topspin Communications, Inc. 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. Topspin Communications, Inc.'s block covers 16,777,216 addresses.
What devices use 0005AD?
Any network device with a MAC address starting 00:05:AD was manufactured by or for Topspin Communications, Inc..