Sichuan Changhong Network Technologies Co., Ltd. — MAC Prefix Identification

A MAC address beginning with 24:D9:04 or A0:C0:16 matches an IEEE MA-L assignment to Sichuan Changhong Network Technologies Co., Ltd.; the records do not identify a device type or product for either prefix.

Each prefix is 24 bits long, leaving 24 bits for suffix values: 16,777,216 possible values per prefix. This is an address-space calculation, not a count of devices, shipments, or observed network traffic. A match establishes that the address begins with an assigned prefix; it does not establish the device’s model, operating system, current owner, or security status.

For both exact prefixes, the first octet has Group bit 0 and Local bit 0, as reflected in the supplied address interpretation. RFC 7042 states that the Group and Local bits have special significance in MAC addresses and that OUIs and longer MAC prefixes are assigned with the Local bit zero and the Group bit unspecified. Flipping either bit changes the prefix and no longer matches these assignments. The IEEE CSV records provide no assignment dates.

Matching prefixes

24:D9:04 and A0:C0:16 (MA-L, 24 bits each) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Device type

Unknown; the supplied records do not map either prefix to a device category [Unknown] — https://standards-oui.ieee.org/oui/oui.csv

Company

Sichuan Changhong Network Technologies Co., Ltd. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

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

Country

China [Confirmed] — 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