What this means
The IEEE assigned the MA-M block 18C3E43 to Proximus sp. z .o.o.. 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 18:C3:E4:3, it is Proximus sp. z .o.o. hardware.
Frequently Asked Questions
Who owns MAC prefix 18C3E43?
18C3E43 is registered to Proximus sp. z .o.o. in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Proximus sp. z .o.o.'s block covers 1,048,576 addresses.
What devices use 18C3E43?
Any network device with a MAC address starting 18:C3:E4:3 was manufactured by or for Proximus sp. z .o.o..