What this means
The IEEE assigned the MA-L block 444B5D to GE Healthcare. 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 44:4B:5D, it is GE Healthcare hardware.
Frequently Asked Questions
Who owns MAC prefix 444B5D?
444B5D is registered to GE Healthcare 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. GE Healthcare's block covers 16,777,216 addresses.
What devices use 444B5D?
Any network device with a MAC address starting 44:4B:5D was manufactured by or for GE Healthcare.