OUI Lookup
5821e9
TWPI
Manufacturer Information
- OUI Prefix
- 5821e9
- Manufacturer
- TWPI
- Address
- PMB# 335; 1121 Annapolis Road Odenton MD US 21113
- Last updated
- 6/11/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 5821E9
The OUI prefix 5821E9 is assigned to TWPI, based in PMB# 335; 1121 Annapolis Road Odenton MD US 21113 . 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 TWPI.