What this means
The IEEE assigned the MA-L block 00903C to ATLANTIC NETWORK SYSTEMS. 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 00:90:3C, it is ATLANTIC NETWORK SYSTEMS hardware.
Frequently Asked Questions
Who owns MAC prefix 00903C?
00903C is registered to ATLANTIC NETWORK SYSTEMS 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. ATLANTIC NETWORK SYSTEMS's block covers 16,777,216 addresses.
What devices use 00903C?
Any network device with a MAC address starting 00:90:3C was manufactured by or for ATLANTIC NETWORK SYSTEMS.