OUI Lookup
0021cb
SMS TECNOLOGIA ELETRONICA LTDA
Manufacturer Information
- OUI Prefix
- 0021cb
- Manufacturer
- SMS TECNOLOGIA ELETRONICA LTDA
- Address
- Av. Pirâmide, 661 DIADEMA São Paulo BR 09970330
- Last updated
- 6/10/2026
Vendor Statistics
- Total prefixes
- 1
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 0021CB
The OUI prefix 0021CB is assigned to SMS TECNOLOGIA ELETRONICA LTDA, based in Av. Pirâmide, 661 DIADEMA São Paulo BR 09970330 . 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 SMS TECNOLOGIA ELETRONICA LTDA.