What this means
The IEEE assigned the MA-L block 00015B to ITALTEL S.p.A/RF-UP-I. 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 00:01:5B, it is ITALTEL S.p.A/RF-UP-I hardware.
Frequently Asked Questions
Who owns MAC prefix 00015B?
00015B is registered to ITALTEL S.p.A/RF-UP-I 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. ITALTEL S.p.A/RF-UP-I's block covers 16,777,216 addresses.
What devices use 00015B?
Any network device with a MAC address starting 00:01:5B was manufactured by or for ITALTEL S.p.A/RF-UP-I.