OUI Lookup
f4b381
WindowMaster A/S
Manufacturer Information
- OUI Prefix
- f4b381
- Manufacturer
- WindowMaster A/S
- Address
- Skelstedet 13 Vedbaek DK 2950
- Last updated
- 6/14/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix F4B381
The OUI prefix F4B381 is assigned to WindowMaster A/S, based in Skelstedet 13 Vedbaek DK 2950 . 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 WindowMaster A/S.