Devices with MAC addresses that start with 00-60-BB were manufactured by Cabletron Systems, Inc.

Device ManufacturerCabletron Systems, Inc.
35 INDUSTRIAL WAY
ROCHESTER NH 03866-5005
Estimated Devices with 00-60-BB16256250
Estimated Total Devices From Mfg81281250
Other MAC Addresses00-E0-63, 00-20-D4, 00-00-1D, 00-E0-3A
Address Examples