Devices with MAC addresses that start with 00-20-54 were manufactured by Sycamore Networks

Device Manufacturer
Sycamore Networks
Manufacturer Location
220 Mill Rd
Chelmsford MA 01824
Estimated Devices using 00-20-54
16,256,250
Estimated Total Devices From Mfg
48,768,750
Related MAC Addresses
00-90-97, 00-D0-D1