OUI Lookup
300d43
Microsoft Mobile Oy
Manufacturer Information
- OUI Prefix
- 300d43
- Manufacturer
- Microsoft Mobile Oy
- Address
- Keilalahdentie 2-4 Espoo N.A. FI 02150
- Last updated
- 6/8/2026
Vendor Statistics
- Total prefixes
- 11
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 300D43
The OUI prefix 300D43 is assigned to Microsoft Mobile Oy, based in Keilalahdentie 2-4 Espoo N.A. FI 02150 . 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 Microsoft Mobile Oy.