What this means
The IEEE assigned the MA-L block 00202B to ADVANCED TELECOMMUNICATIONS MODULES, 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 00:20:2B, it is ADVANCED TELECOMMUNICATIONS MODULES, LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 00202B?
00202B is registered to ADVANCED TELECOMMUNICATIONS MODULES, 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. ADVANCED TELECOMMUNICATIONS MODULES, LTD.'s block covers 16,777,216 addresses.
What devices use 00202B?
Any network device with a MAC address starting 00:20:2B was manufactured by or for ADVANCED TELECOMMUNICATIONS MODULES, LTD..