20:5F:3D Adtran Inc
Every MAC address from 20:5F:3D:00:00:00 to 20:5F:3D:FF:FF:FF belongs to a block the IEEE assigned to Adtran Inc. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 20:5F:3D belongs to
Written 20:5F:3D, 20-5F-3D or 205F3D, depending on the system. Look up a full address.
Prefix
20:5F:3D
Organization
Adtran Inc
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
20:5F:3D:00:00:00
Last address
20:5F:3D:FF:FF:FF
Address type
Globally unique, unicast
Registered address
Victory House, Vision Park, Chivers Way, Histon Cambridge GB CB24 9ZR