What this means
The IEEE assigned the MA-L block 1C4455 to Sieb & Meyer AG. 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 1C:44:55, it is Sieb & Meyer AG hardware.
Frequently Asked Questions
Who owns MAC prefix 1C4455?
1C4455 is registered to Sieb & Meyer AG 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. Sieb & Meyer AG's block covers 16,777,216 addresses.
What devices use 1C4455?
Any network device with a MAC address starting 1C:44:55 was manufactured by or for Sieb & Meyer AG.