What this means
The IEEE assigned the MA-L block C01803 to HP 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 C0:18:03, it is HP Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix C01803?
C01803 is registered to HP 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. HP Inc.'s block covers 16,777,216 addresses.
What devices use C01803?
Any network device with a MAC address starting C0:18:03 was manufactured by or for HP Inc..