What this means
The IEEE assigned the MA-L block E4121D to Samsung Electronics Co.,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 E4:12:1D, it is Samsung Electronics Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix E4121D?
E4121D is registered to Samsung Electronics Co.,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. Samsung Electronics Co.,Ltd's block covers 16,777,216 addresses.
What devices use E4121D?
Any network device with a MAC address starting E4:12:1D was manufactured by or for Samsung Electronics Co.,Ltd.