What this means
The IEEE assigned the MA-M block 1874E23 to CT Company. 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 18:74:E2:3, it is CT Company hardware.
Frequently Asked Questions
Who owns MAC prefix 1874E23?
1874E23 is registered to CT Company 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. CT Company's block covers 1,048,576 addresses.
What devices use 1874E23?
Any network device with a MAC address starting 18:74:E2:3 was manufactured by or for CT Company.