ALFA, INC. — MAC prefix identification
Summary
- // what this is
- ALFA is registered to MAC prefix
00:C0:CAin the IEEE OUI database. When a device's MAC address begins with00:C0:CA, that block was registered by ALFA — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- RFC 7042 discusses 48-bit MAC identifiers and the Group and Local bits.
About this vendor.
A MAC address beginning 00:C0:CA matches an IEEE MA-L assignment to ALFA, INC.; the record does not identify a device type or product. The assignment identifies a registered prefix, not the maker of a particular device or evidence of its current deployment.
This is a 24-bit prefix, leaving 24 bits for suffix values: 16,777,216 possible values. That is a mathematical range, not a count of devices or shipments. A matching address can establish that its first 24 bits match this assignment; it cannot establish which suffix is in use or what equipment carries it.
For this exact prefix, the first octet is 00: its Group bit and Local bit are both zero. Those bits are fixed in a literal 00:C0:CA match. Turning either bit on changes the prefix and therefore no longer matches this exact assignment. RFC 7042 explains these bits and the use of three-octet OUIs as well as longer assigned prefixes.
The MA-L registry entry identifies ALFA, INC. and gives a Taiwan address. Registry identification alone does not establish an assignment date, product catalog, device category, industry, website, or related vendor.
- Matching prefix
00:C0:CA(MA-L, 24 bits) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Device category
- Unknown; the supplied registry entry does not specify a device type. [Unknown] — https://standards-oui.ieee.org/oui/oui.csv