YAML

MAC Address Vendor Assignments - YAML

MAC Address Vendor Assignments is an allocation system for network device identifiers managed by the IEEE Registration Authority. There are three block types: MA-L (formerly OUI), MA-M, and MA-S, with unique identifiers assigned to each vendor. This enables unique identification of network devices worldwide, used in Ethernet, Wi-Fi, Bluetooth, and other communications.

MAC address OUI IEEE network vendor identification Ethernet Wi-Fi

- code: "MA-L"
  slug: "ma-l-mac-address-block-large"
  name: "MA-L (MAC Address Block Large)"
  description: "Large block of approximately 16 million addresses, equivalent to the traditional OUI."
  previousName: "OUI (Organizationally Unique Identifier)"
  ieeeAssignedBits: 24
  addressCount: "~16,777,216 (2^24)"
  eui48Support: true
  eui64Support: true
- code: "MA-M"
  slug: "ma-m-mac-address-block-medium"
  name: "MA-M (MAC Address Block Medium)"
  description: "Medium block of approximately 1 million addresses."
  previousName: null
  ieeeAssignedBits: 28
  addressCount: "~1,048,576 (2^20)"
  eui48Support: true
  eui64Support: true
- code: "MA-S"
  slug: "ma-s-mac-address-block-small"
  name: "MA-S (MAC Address Block Small)"
  description: "Small block of 4,096 addresses, equivalent to the traditional OUI-36."
  previousName: "OUI-36, IAB (Individual Address Block)"
  ieeeAssignedBits: 36
  addressCount: "4,096 (2^12)"
  eui48Support: true
  eui64Support: true
- code: "CID"
  slug: "cid-company-id"
  name: "CID (Company ID)"
  description: "24-bit identifier that cannot be used to generate MAC addresses."
  previousName: null
  ieeeAssignedBits: 24
  addressCount: "N/A（MACアドレス生成不可）"
  eui48Support: false
  eui64Support: false