Marconi Communications

Marconi Communications holds 3 OUI prefixes in the IEEE registry. Each prefix is the first three octets of a MAC address and covers a block of 16,777,216 addresses, so devices built by Marconi Communications draw from a pool of about 50,331,648 possible MAC addresses in total.

Registered address: 1000 Fore Drive Warrendale PA US 15086-7502

All 3 prefixes

• 00:20:4800:20:48:00:00:00 – 00:20:48:FF:FF:FF
• 00:90:4500:90:45:00:00:00 – 00:90:45:FF:FF:FF
• 00:A0:7800:A0:78:00:00:00 – 00:A0:78:FF:FF:FF

Have a full MAC address? Look it up to see which of these prefixes it belongs to — or browse the full manufacturer directory.