Addat s.r.o. MAC Prefix Identification
Summary
- // what this is
- Addat s.r.o is registered to MAC prefix
84:76:16in the IEEE OUI database. When a device's MAC address begins with84:76:16, that block was registered by Addat s.r.o — the OUI identifies the maker of the network hardware, which is not always the brand on the device.
About this vendor.
A MAC address beginning 84:76:16 matches an IEEE MA-L assignment registered to Addat s.r.o.; the prefix alone does not identify a device type. The company describes its work as custom electronics manufacturing and EMS, heating and ventilation control, and security systems for boiler rooms and heat exchange stations. It says it was founded in 1992 and is based in Liberec, Czech Republic. Its catalog includes the wired ZS-100 flood detector, but no supplied evidence links that product to this prefix.
This is a 24-bit prefix, leaving 24 bits for suffix values: 16,777,216 possible values within the block. That is a mathematical address-space count, not a count of devices or shipments. In the first byte 84 (binary 10000100), the Group bit is 0 and the Local bit is 0. Those bits are fixed for an exact literal prefix match; changing either bit produces a different prefix. RFC 7042 explains the structure and interpretation of 48-bit MAC identifiers.
A matching captured address supports an assignment match, not proof of the device, product, operator, or current deployment.
- Registry match
84:76:16is assigned to Addat s.r.o. under MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Device class
- Unknown; the assignment does not specify a device category [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- Addat s.r.o. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- Czech Republic [Confirmed] — https://www.addat.cz/
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Assigned prefix
84:76:16[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Assignment dates
- Assignment dates are unavailable in these IEEE CSV records. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Industry
- Custom electronics manufacturing and EMS; heating and ventilation control; boiler room and heat exchange station security [Confirmed] — https://www.addat.cz/
- Notable products
- ZS-100 wired flood detector [Confirmed] — https://www.addat.cz/realizace/zs-100-detektor
- Device types
- Unknown for this exact prefix [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Website
- https://www.addat.cz/ [Confirmed] — https://www.addat.cz/