MAC Vendor Lookup

MAC Address

Supports various formats: colons, dashes, dots, or no separators

AA BB CC

OUI (Vendor Prefix)

DD EE FF

NIC Specific

When set, indicates the MAC address was assigned locally (not by manufacturer). Common in virtual machines, containers, and privacy features.

x2:xx:xx:xx:xx:xx, x6:xx:xx:xx:xx:xx, xA:xx:xx:xx:xx:xx, xE:xx:xx:xx:xx:xx

When set, indicates a multicast address (sent to multiple devices). Unicast addresses have this bit cleared.

x1:xx:xx:xx:xx:xx, x3:xx:xx:xx:xx:xx, x5:xx:xx:xx:xx:xx, ...

Type	Prefix Size	Address Block	Description
MA-L	24-bit (6 hex)	~16.7M addresses	Large block for major vendors (most common)
MA-M	28-bit (7 hex)	~1M addresses	Medium block for mid-size manufacturers
MA-S	36-bit (9 hex)	4096 addresses	Small block for limited production
IAB	36-bit (9 hex)	4096 addresses	Individual Address Block (legacy, replaced by MA-S)

AA:BB:CC:DD:EE:FF Colon-separated (Unix/Linux)

AA-BB-CC-DD-EE-FF Hyphen-separated (Windows)

AABB.CCDD.EEFF Dot-separated (Cisco)

AABBCCDDEEFF No separator

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