Qolsys Inc. MAC prefixes: vendor identified; device type unknown

A MAC address beginning with 3C:31:78 or 18:C1:E2 matches an IEEE MA-L assignment to Qolsys Inc.; the assignment alone does not identify a device category or product. Both prefixes have a 24-bit boundary, leaving 24 bits for the suffix. The IEEE records supplied here contain no assignment dates.

In the first octet of each listed prefix, the Group bit and Local bit are both zero, according to the supplied address interpretation. The IEEE registry lists both prefixes, 3C:31:78 and 18:C1:E2, as MA-L assignments to Qolsys Inc. A matching address supports a registry match only; it does not establish which device used it, when or where it was deployed, or whether it is currently in use.

Each 24-bit suffix has 16,777,216 possible values. That is the size of the address space beneath each prefix, not a count of devices, shipments, or observed traffic. Changing either bit in the first octet would produce a different prefix and would no longer be an exact match to these assignments.

Device category

Unknown; no supplied evidence maps a device category to these exact prefixes [Unknown] — https://standards-oui.ieee.org/oui/oui.csv

Matching boundary

3C:31:78 and 18:C1:E2 each match 24 bits, leaving 24 suffix bits [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt

Company

Qolsys Inc. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Prefixes

3C:31:78 and 18:C1:E2 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

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

Device types

Unknown [Unknown] — 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