AEON SYSTEMS, INC. — MAC prefix identifies a registry assignment

A MAC address beginning with 00:40:19 matches an IEEE MA-L assignment to AEON SYSTEMS, INC.; the prefix alone does not identify a device model or device category. The IEEE CSV records one full assignment, 00:40:19, with a 24-bit matching boundary. Its first-byte Group and Local bits are both zero, fixed for this literal prefix. Changing either bit produces a different prefix; those changes do not describe variation within this assignment.

After the 24-bit prefix, 24 bits remain, allowing 16,777,216 possible suffix values. That is a count of possible values, not a count of devices, shipments, or addresses observed in use. RFC 7042 describes EUI-48 identifiers as an initial OUI or longer assigned prefix followed by the remaining bits. A captured match supports the registry-assignment identification only; it does not establish the device, operating system, deployment, current legal identity, or security state.

Device category

Unknown; the supplied evidence does not map a device category to this prefix. [Unknown]

Matching prefix

00:40:19 — MA-L, 24 bits. [Confirmed]

Possible suffix values

16,777,216 across the remaining 24 bits; this is not a device or shipment count. [Confirmed]

Company

AEON SYSTEMS, INC. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

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

Prefix

00:40:19 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Country

United States [Confirmed] — 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

Device category

Unknown [Unknown]