00:12:A9 3Com Ltd
Every MAC address from 00:12:A9:00:00:00 to 00:12:A9:FF:FF:FF belongs to a block the IEEE assigned to 3Com Ltd. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:12:A9 belongs to
Written 00:12:A9, 00-12-A9 or 0012A9, depending on the system. Look up a full address.
Prefix
00:12:A9
Organization
3Com Ltd
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:12:A9:00:00:00
Last address
00:12:A9:FF:FF:FF
Address type
Globally unique, unicast
Registered address
Peoplebuilding 2 Hemel Hempstead Herts GB HP2 4NW