Acacia Communications MAC prefix 7C:B2:5C: vendor identified; device type unknown
Summary
- // what this is
- Acacia Communications is registered to MAC prefix
7C:B2:5Cin the IEEE OUI database. When a device's MAC address begins with7C:B2:5C, that block was registered by Acacia Communications — the OUI identifies the maker of the network hardware, which is not always the brand on the device.
About this vendor.
A MAC address beginning 7C:B2:5C matches an IEEE MA-L assignment registered to Acacia Communications. The assignment identifies the registry entry; the supplied evidence does not identify a device category or product that uses it.
This is a 24-bit prefix, leaving 24 bits for suffix values. Matching an address to this prefix identifies it as within the registered address block; that match alone does not identify a particular device or deployment. The 16,777,216 possible suffix values describe the size of the address space, not the number of devices.
The first byte, 7C (hexadecimal), has Group bit 0 and Local bit 0. For this exact prefix, those bits are fixed: the address is individual rather than group, and globally administered rather than locally administered. Changing either bit changes the prefix and no longer matches this exact assignment. RFC 7042 explains the significance of these bits in MAC identifiers.
The supplied IEEE CSV record has no assignment date. Assignment dates are unavailable in these IEEE CSV records.
- Registry match
- Acacia Communications — MA-L assignment
7C:B2:5C[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv - Device type
- Unknown; the supplied evidence does not map this prefix to a device category [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Address boundary
7C:B2:5Cis 24 bits, leaving 24 suffix bits and 16,777,216 possible suffix values [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt- Group and Local bits
- Both are 0 in first byte
7C; changing either bit changes the exact prefix [Confirmed] — https://www.rfc-editor.org/rfc/rfc7042.txt
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- Acacia Communications [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Total assigned prefixes
- 1 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device types
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Industry
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Website
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Organization status
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv