What this means
The IEEE assigned the MA-L block 00901D to Gallagher Group Limited. 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 00:90:1D, it is Gallagher Group Limited hardware.
Frequently Asked Questions
Who owns MAC prefix 00901D?
00901D is registered to Gallagher Group Limited 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. Gallagher Group Limited's block covers 16,777,216 addresses.
What devices use 00901D?
Any network device with a MAC address starting 00:90:1D was manufactured by or for Gallagher Group Limited.