21168 MAC Prefix: Registry Holder, Device Unknown

A MAC address beginning 00:25:C3 matches an IEEE MA-L assignment registered to 21168; the available evidence does not identify a device type or product for this prefix. A match establishes that the address begins with this assigned 24-bit prefix, not which device sent it, who operates that device today, or whether it is safe. [Source: https://standards-oui.ieee.org/oui/oui.csv]

The assignment record gives the organization name 21168 and an unambiguous country indication, MX (Mexico). It does not provide evidence about the registrant’s products, industry, website, or current legal identity. No other prefixes are listed for this registry name in the supplied records. [Source: https://standards-oui.ieee.org/oui/oui.csv]

The prefix fixes the first 24 bits, leaving 24 suffix bits: 16,777,216 possible suffix values. In 00, the Group bit (01) and Local bit (02) are both zero, so this literal prefix denotes individual and globally administered address space under RFC 7042’s bit interpretation. Changing either bit changes the prefix and no longer matches 00:25:C3; suffix capacity is not a count of devices or shipments. [Source: https://www.rfc-editor.org/rfc/rfc7042.txt]

MAC prefix

00:25:C3 (MA-L assignment)

Device identification

Unknown; no device category is mapped to this exact prefix in the supplied evidence.

Country

Mexico (record indicates MX).

Matching boundary

The first 24 bits must match; 24 suffix bits remain.

Company

21168 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

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

Prefix

00:25:C3 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Country

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

Device type

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