00:12:5C Green Hills Software, Inc.
Every MAC address from 00:12:5C:00:00:00 to 00:12:5C:FF:FF:FF belongs to a block the IEEE assigned to Green Hills Software, Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:12:5C belongs to
Written 00:12:5C, 00-12-5C or 00125C, depending on the system. Look up a full address.
Prefix
00:12:5C
Organization
Green Hills Software, Inc.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:12:5C:00:00:00
Last address
00:12:5C:FF:FF:FF
Address type
Globally unique, unicast
Registered address
30 West Sola Street Santa Barbara CA US 93101