ADVANCED FIBRE COMMUNICATIONS — MAC prefix identifies registry assignment
Summary
- // what this is
- Advanced Fibre Communications is registered to MAC prefix
00:90:77in the IEEE OUI database. When a device's MAC address begins with00:90:77, that block was registered by Advanced Fibre Communications — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- For the exact 24-bit prefix 00:90:77, the first-byte Group and Local bits are both 0. A literal prefix match fixes these bits; changing either produces a different prefix. The remaining 24 bits allow 16,777,216 possible suffix values, not an observed device or shipment count. A match indicates a registry assignment, not a particular device.
About this vendor.
A MAC address beginning 00:90:77 identifies an IEEE MA-L assignment registered to ADVANCED FIBRE COMMUNICATIONS; it does not identify a particular device or prove who deployed the address. The supplied records do not establish a device category, product, or industry for this registrant.
This is a 24-bit prefix, leaving 24 bits for suffix values: 16,777,216 possible values. That arithmetic describes the address space available after the prefix, not a count of devices made, shipped, or observed. RFC 7042 describes MAC identifiers as an assigned initial prefix followed by additional bits.
For this exact prefix, the first-byte Group bit and Local bit are both zero. They are fixed by the literal prefix match. Changing either bit produces a different prefix; it does not describe variation among addresses that retain 00:90:77. A matching captured address supports an assignment-level identification only.
- Matching prefix
00:90:77(24 bits) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- ADVANCED FIBRE COMMUNICATIONS [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
00:90:77[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- US [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
- Device types
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Industry
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv