- Prefix
- F4:B3:81 F4-B3-81 F4B3.81
- Block type
- MA-L (16,777,216 addresses)
- Address range
- F4:B3:81:00:00:00 – F4:B3:81:FF:FF:FF
- Organization
- WindowMaster A/S
- Registered address
- Skelstedet 13, Vedbaek 2950, DK
- Country
- Denmark (DK)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up F4:B3:81:00:00:00
WindowMaster A/S holds 1 block in total: see all. Source: IEEE Registration Authority public listing.