Alfa Instrumentos Eletronicos Ltda. — MAC prefix identifies registry assignment only
Summary
- // what this is
- Alfa Instrumentos Eletronicos Ltda is registered to MAC prefix
70:53:3Fin the IEEE OUI database. When a device's MAC address begins with70:53:3F, that block was registered by Alfa Instrumentos Eletronicos Ltda — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- This 24-bit prefix match identifies the IEEE registry assignment only. Its first-octet Group and Local bits are both zero and fixed for an exact match. The remaining 24 bits allow 16,777,216 possible suffix values, not an observed device or shipment count. RFC 7042 provides MAC address and prefix interpretation guidance.
About this vendor.
A MAC address beginning 70:53:3F matches an IEEE MA-L assignment to Alfa Instrumentos Eletronicos Ltda.; the available evidence does not identify a device type or show which products use it. The assignment identifies a registry holder, not the observed device’s current owner, deployment, safety, or security state.
The prefix is 24 bits of a 48-bit MAC address, leaving 24 suffix bits. That permits 16,777,216 possible suffix values; it does not indicate a device or shipment count. A matching capture establishes only that its first three octets match this assignment. It does not identify a particular device or product.
For this prefix, the first octet is 70 hexadecimal. Its Group bit and Local bit are both zero. Those bits are fixed for an exact literal prefix match; changing either produces a different prefix. RFC 7042 describes the significance of these bits and MAC prefix assignments. The supplied IEEE CSV record has no assignment date.
- Matching prefix
70:53:3F(24 bits) [Confirmed]
- Company
- Alfa Instrumentos Eletronicos Ltda. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefix
70:53:3F[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- BR (Brazil), as indicated by the retrieved IEEE record [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device types
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Industry
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Notable products
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Website
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Organization status
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Related vendors
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Historic prefix
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv