Advanced Control Systems doo — identified only as the MA-L registrant

A MAC address beginning 00:21:42 matches an IEEE MA-L assignment registered to Advanced Control Systems doo; the available evidence does not identify a device or product using it. A prefix match establishes the matching registry assignment, not a particular device, current legal identity, or security state.

The assignment is 24 bits long, leaving 24 bits for suffix values: 16,777,216 possible values. That is an arithmetic range, not a count of devices, shipments, or addresses actually in use. For this exact prefix, the first byte 00 has Group bit 0 and Local bit 0. Those bits are fixed by the literal prefix; changing either changes the prefix. Address capture alone cannot show how widely the assignment is deployed.

Identification

00:21:42 is assigned to Advanced Control Systems doo in the MA-L registry; no specific device category is established.

Prefix length

24 bits, leaving 24 suffix bits and 16,777,216 possible suffix values; this does not indicate actual device or shipment count.

First-byte bits

00 has Group bit 0 and Local bit 0. Both are fixed for an exact match to this prefix.

Interpretation

A match identifies the registry assignment, not a specific device, product, deployment, or security state.

Company

Advanced Control Systems doo [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

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

Prefix

00:21:42 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Country

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