ADVANCE MICRO RESEARCH, INC.: MAC Prefix Identifies the Registry Assignee
Summary
- // what this is
- Advance Micro Research is registered to MAC prefix
00:C0:A0in the IEEE OUI database. When a device's MAC address begins with00:C0:A0, that block was registered by Advance Micro Research — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- A matching 00:C0:A0 prefix identifies the MA-L registry assignment only. Its 24-bit prefix leaves 24 suffix bits, allowing 16,777,216 possible suffix values; this is not an observed device or shipment count. The Group and Local bits in first octet 00 are both zero and fixed for this exact prefix. Changing either bit creates a different prefix.
About this vendor.
A MAC address beginning 00:C0:A0 matches an IEEE MA-L assignment registered to ADVANCE MICRO RESEARCH, INC.; the record does not identify a device category or product. The assignment is a 24-bit prefix, leaving 24 bits for the remaining address.
RFC 7042 explains that 48-bit MAC identifiers use an assigned prefix followed by additional bits, and that the first octet contains Group and Local bits. For 00, both bits are zero. Those bit values are fixed for an exact 00:C0:A0 prefix match; changing either bit produces a different prefix and is not variation within this assignment.
The 24-bit suffix permits 16,777,216 possible values. That is an address-space count, not a count of devices, shipments, or observed network activity. A matching address supports identification of the registry assignment only; it does not establish which device used it, deployment, current corporate identity, or security status.
- Matching prefix
00:C0:A0(MA-L, 24 bits) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Device category
- Unknown [Unknown]
- Address interpretation
- First-octet Group bit 0 and Local bit 0; 24 suffix bits permit 16,777,216 values [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt
- Company
- ADVANCE MICRO RESEARCH, INC. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefix
00:C0:A0[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Total prefixes
- 1 [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