OUI Lookup
0012a9
3Com Ltd
Manufacturer Information
- OUI Prefix
- 0012a9
- Manufacturer
- 3Com Ltd
- Address
- Peoplebuilding 2 Hemel Hempstead Herts GB HP2 4NW
- Last updated
- 6/11/2026
Vendor Statistics
- Total prefixes
- 11
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 0012A9
The OUI prefix 0012A9 is assigned to 3Com Ltd, based in Peoplebuilding 2 Hemel Hempstead Herts GB HP2 4NW . It is a MA-L type block of 24 bits (first three octets). Allows up to 16 million unique MAC addresses. If you find this prefix on your network, the devices belong to 3Com Ltd.