OUI Lookup
d4f0b4
Napco Security Technologies
Manufacturer Information
- OUI Prefix
- d4f0b4
- Manufacturer
- Napco Security Technologies
- Address
- 333 Bayview Ave Amityville NY US 11701
- Last updated
- 6/8/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix D4F0B4
The OUI prefix D4F0B4 is assigned to Napco Security Technologies, based in 333 Bayview Ave Amityville NY US 11701 . 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 Napco Security Technologies.