00:00:1D Cabletron Systems, Inc.
Every MAC address from 00:00:1D:00:00:00 to 00:00:1D: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 00:00:1D belongs to
Written 00:00:1D, 00-00-1D or 00001D, depending on the system. Look up a full address.
Prefix
00:00:1D
Organization
Cabletron Systems, Inc.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:00:1D:00:00:00
Last address
00:00:1D:FF:FF:FF
Address type
Globally unique, unicast
Registered address
35 INDUSTRIAL WAY ROCHESTER NH US 03867