What this means
The IEEE assigned the MA-L block 00251B to Philips CareServant. 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 00:25:1B, it is Philips CareServant hardware.
Frequently Asked Questions
Who owns MAC prefix 00251B?
00251B is registered to Philips CareServant 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. Philips CareServant's block covers 16,777,216 addresses.
What devices use 00251B?
Any network device with a MAC address starting 00:25:1B was manufactured by or for Philips CareServant.