ADD-Engineering BV MAC prefix: device identification Unknown

A MAC address beginning 28:F5:32 identifies an IEEE MA-L assignment registered to ADD-Engineering BV; the supplied records do not establish a device category or product for this prefix. The assignment is evidence of registry attribution, not a particular device, deployment, traffic pattern, or safety status.

28:F5:32 is a 24-bit prefix, leaving 24 bits for suffix values: 16,777,216 possible values. That is a mathematical address-space count, not a count of devices or shipments. For this exact prefix, the first octet 28 has Group bit 0 and Local bit 0. Those bits are fixed by the literal prefix; changing either produces a different prefix. (RFC 7042)

Device identification

Unknown; no device category is tied to this exact prefix in the supplied evidence [Unknown]

Prefix length

24 bits, with a 24-bit matching boundary [Confirmed]

Suffix space

16,777,216 possible values; this is not a device or shipment count [Confirmed]

Group and Local bits

Both are 0 in first octet 28; either bit changing creates a different prefix [Confirmed]

Company

ADD-Engineering BV [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Prefix

28:F5:32 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Device types

Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv

Assignment date

Assignment dates are unavailable in these IEEE CSV records. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Prefix interpretation

RFC 7042 describes MAC identifiers as an assigned prefix followed by additional bits; the Group and Local bits for 28:F5:32 are both 0 [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt