INI
MAC Address Vendor Assignments - INI
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
[item.ma-l-mac-address-block-large]
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)
[item.ma-m-mac-address-block-medium]
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=
[item.ma-s-mac-address-block-small]
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)
[item.cid-company-id]
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=