00:20:D4 Cabletron Systems, Inc.
Every MAC address from 00:20:D4:00:00:00 to 00:20:D4:FF:FF:FF belongs to a block the IEEE assigned to Cabletron Systems, Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:20:D4 belongs to
Written 00:20:D4, 00-20-D4 or 0020D4, depending on the system. Look up a full address.
Prefix
00:20:D4
Organization
Cabletron Systems, Inc.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:20:D4:00:00:00
Last address
00:20:D4:FF:FF:FF
Address type
Globally unique, unicast
Registered address
35 INDUSTRIAL WAY ROHESTER NH US 03866-5005