MAC Address Lookup — OUI Vendor Identifier
Look up the manufacturer and vendor information for any MAC address using the OUI database.
Accepts any format: colons, dashes, dots, or plain hex
MAC Address Lookup — OUI Vendor Identifier
A MAC address (Media Access Control address) is a unique hardware identifier assigned to a network interface card (NIC). It is used at the data link layer of the OSI model to identify devices on a local network.
MAC Address Structure
A MAC address consists of 6 bytes (48 bits) expressed as 12 hexadecimal digits:
- First 3 bytes (OUI): Assigned by IEEE to manufacturers. Identifies the vendor.
- Last 3 bytes: Assigned by the manufacturer to uniquely identify the device.
Common MAC Address Formats
00:1A:2B:3C:4D:5E— colon-separated (most common)00-1A-2B-3C-4D-5E— dash-separated (Windows style)001A.2B3C.4D5E— dot-separated (Cisco style)001A2B3C4D5E— plain hex