Tiesse SpA MAC prefixes: vendor identified, device type unknown
Summary
- // what this is
- Tiesse SpA is registered to MAC prefix
00:0D:5Aand 1 more in the IEEE OUI database. When a device's MAC address begins with00:0D:5A, that block was registered by Tiesse SpA — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- A 24-bit prefix match identifies the registry assignment. Both prefixes have Group bit 0 and Local bit 0; each leaves 24 suffix bits, allowing 16,777,216 possible values. This is not a device or shipment count, and changing either bit yields a different prefix. RFC 7042 describes EUI-48 structure and these bit meanings.
About this vendor.
A MAC address beginning with 00:0D:5A or C8:77:65 matches an IEEE MA-L assignment to Tiesse SpA; the available evidence does not identify a device type. The registry record indicates Italy. An assignment identifies the registered organization for the prefix, not the device’s maker, current owner, deployment, or safety status.
Each prefix fixes the first 24 bits of a 48-bit MAC address, leaving 24 suffix bits, or 16,777,216 possible suffix values per prefix. That arithmetic is not a count of devices or shipments. Both prefixes have Group bit 0 and Local bit 0 in their first octet. These bits are fixed for an exact prefix match; changing either bit produces a different prefix. RFC 7042 describes the MAC identifier structure and these bit meanings.
Compare all three leading octets against the full prefixes. A match supports association with the registry assignment only; it does not establish a particular product or device category. Assignment dates are unavailable in these IEEE CSV records.
- Vendor
- Tiesse SpA is the IEEE MA-L registrant for these matching prefixes. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device type
- Unknown; no supplied source maps a device category to these exact prefixes. [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- Italy, as indicated by the registry record. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- Tiesse SpA [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- Italy [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device type
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Assignment dates
- Assignment dates are unavailable in these IEEE CSV records. [Unknown] — https://standards-oui.ieee.org/oui/oui.csv