OUI Lookup
0021e3
SerialTek LLC
Manufacturer Information
- OUI Prefix
- 0021e3
- Manufacturer
- SerialTek LLC
- Address
- 1570 Oakland Road San Jose CA US 95131
- Last updated
- 6/11/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 0021E3
The OUI prefix 0021E3 is assigned to SerialTek LLC, based in 1570 Oakland Road San Jose CA US 95131 . 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 SerialTek LLC.