MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
Cabletron Systems, Inc.
OUI prefix: 00:20:D4
Vendor name: Cabletron Systems, Inc.
35 INDUSTRIAL WAY
ROHESTER NH 03866-5005
Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)
Last updated: 17 November 2015
Initial registration: 22 April 1998