What this means
The IEEE assigned the MA-L block A45DA1 to ADB Broadband Italia. 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 A4:5D:A1, it is ADB Broadband Italia hardware.
Frequently Asked Questions
Who owns MAC prefix A45DA1?
A45DA1 is registered to ADB Broadband Italia 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. ADB Broadband Italia's block covers 16,777,216 addresses.
What devices use A45DA1?
Any network device with a MAC address starting A4:5D:A1 was manufactured by or for ADB Broadband Italia.