What this means
The IEEE assigned the MA-L block B05B1F to THERMO FISHER SCIENTIFIC S.P.A.. 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 B0:5B:1F, it is THERMO FISHER SCIENTIFIC S.P.A. hardware.
Frequently Asked Questions
Who owns MAC prefix B05B1F?
B05B1F is registered to THERMO FISHER SCIENTIFIC S.P.A. 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. THERMO FISHER SCIENTIFIC S.P.A.'s block covers 16,777,216 addresses.
What devices use B05B1F?
Any network device with a MAC address starting B0:5B:1F was manufactured by or for THERMO FISHER SCIENTIFIC S.P.A..