OUI Lookup
0021c7
Russound
Manufacturer Information
- OUI Prefix
- 0021c7
- Manufacturer
- Russound
- Address
- 5 Forbes Road Newmarket NH US 03857
- Last updated
- 6/12/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 0021C7
The OUI prefix 0021C7 is assigned to Russound, based in 5 Forbes Road Newmarket NH US 03857 . 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 Russound.