OUI Lookup
00065d
Heidelberg Web Systems
Manufacturer Information
- OUI Prefix
- 00065d
- Manufacturer
- Heidelberg Web Systems
- Address
- 121 Technology Dr. Durham NH US 03824
- Last updated
- 6/10/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 00065D
The OUI prefix 00065D is assigned to Heidelberg Web Systems, based in 121 Technology Dr. Durham NH US 03824 . 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 Heidelberg Web Systems.