What this means
The IEEE assigned the MA-L block 0040DB to ADVANCED TECHNICAL SOLUTIONS. 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 00:40:DB, it is ADVANCED TECHNICAL SOLUTIONS hardware.
Frequently Asked Questions
Who owns MAC prefix 0040DB?
0040DB is registered to ADVANCED TECHNICAL SOLUTIONS 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. ADVANCED TECHNICAL SOLUTIONS's block covers 16,777,216 addresses.
What devices use 0040DB?
Any network device with a MAC address starting 00:40:DB was manufactured by or for ADVANCED TECHNICAL SOLUTIONS.