OUI Lookup
00203d
Honeywell Environmental & Combustion Controls
Manufacturer Information
- OUI Prefix
- 00203d
- Manufacturer
- Honeywell Environmental & Combustion Controls
- Address
- 1985 Douglas Drive Golden Valley MN US 55422
- Last updated
- 6/20/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 00203D
The OUI prefix 00203D is assigned to Honeywell Environmental & Combustion Controls, based in 1985 Douglas Drive Golden Valley MN US 55422 . 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 Honeywell Environmental & Combustion Controls.