What this means
The IEEE assigned the MA-L block F45420 to TELLESCOM INDUSTRIA E COMERCIO EM TELECOMUNICACAO. 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 F4:54:20, it is TELLESCOM INDUSTRIA E COMERCIO EM TELECOMUNICACAO hardware.
Frequently Asked Questions
Who owns MAC prefix F45420?
F45420 is registered to TELLESCOM INDUSTRIA E COMERCIO EM TELECOMUNICACAO 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. TELLESCOM INDUSTRIA E COMERCIO EM TELECOMUNICACAO's block covers 16,777,216 addresses.
What devices use F45420?
Any network device with a MAC address starting F4:54:20 was manufactured by or for TELLESCOM INDUSTRIA E COMERCIO EM TELECOMUNICACAO.