What this means
The IEEE assigned the MA-L block 001978 to Datum Systems, 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 00:19:78, it is Datum Systems, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 001978?
001978 is registered to Datum Systems, 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. Datum Systems, Inc.'s block covers 16,777,216 addresses.
What devices use 001978?
Any network device with a MAC address starting 00:19:78 was manufactured by or for Datum Systems, Inc..