TSV

MAC Address Vendor Assignments - TSV

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