TOML

MAC Address Vendor Assignments - TOML

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

[[items]]
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."
addressCount = "~16,777,216 (2^24)"
eui48Support = true
eui64Support = true
ieeeAssignedBits = 24
previousName = "OUI (Organizationally Unique Identifier)"

[[items]]
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."
addressCount = "~1,048,576 (2^20)"
eui48Support = true
eui64Support = true
ieeeAssignedBits = 28
previousName = ""

[[items]]
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."
addressCount = "4,096 (2^12)"
eui48Support = true
eui64Support = true
ieeeAssignedBits = 36
previousName = "OUI-36, IAB (Individual Address Block)"

[[items]]
code = "CID"
slug = "cid-company-id"
name = "CID (Company ID)"
description = "24-bit identifier that cannot be used to generate MAC addresses."
addressCount = "N/A（MACアドレス生成不可）"
eui48Support = false
eui64Support = false
ieeeAssignedBits = 24
previousName = ""