What this means
The IEEE assigned the MA-L block 7C0187 to Curtis Instruments, Inc.. 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 7C:01:87, it is Curtis Instruments, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 7C0187?
7C0187 is registered to Curtis Instruments, Inc. 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. Curtis Instruments, Inc.'s block covers 16,777,216 addresses.
What devices use 7C0187?
Any network device with a MAC address starting 7C:01:87 was manufactured by or for Curtis Instruments, Inc..