Devices with MAC addresses that start with 00-20-D4 were manufactured by Cabletron Systems, Inc.

Device Manufacturer
Cabletron Systems, Inc.
Manufacturer Location
35 INDUSTRIAL WAY
ROHESTER NH 03866-5005
Estimated Devices using 00-20-D4
16,256,250
Estimated Total Devices From Mfg
81,281,250
Related MAC Addresses
00-E0-63, 00-00-1D, 00-60-BB, 00-E0-3A