OUI Lookup
001c91
Gefen LLC
Manufacturer Information
- OUI Prefix
- 001c91
- Manufacturer
- Gefen LLC
- Address
- 5919 Sea Otter Place Carlsbad CA US 92010
- Last updated
- 6/11/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 001C91
The OUI prefix 001C91 is assigned to Gefen LLC, based in 5919 Sea Otter Place Carlsbad CA US 92010 . 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 Gefen LLC.