What this means
The IEEE assigned the MA-L block 001A55 to ACA-Digital 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 00:1A:55, it is ACA-Digital Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 001A55?
001A55 is registered to ACA-Digital 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. ACA-Digital Corporation's block covers 16,777,216 addresses.
What devices use 001A55?
Any network device with a MAC address starting 00:1A:55 was manufactured by or for ACA-Digital Corporation.