MAC Address Lookup
Identify the manufacturer from any MAC address using the IEEE OUI database.
Accepts any MAC format: colon, dash, or dotted notation. Only the first 3 octets (OUI) are used for vendor lookup.
What is an OUI?
An OUI (Organizationally Unique Identifier) is the first 24 bits (3 octets) of a MAC address, assigned by the IEEE Registration Authority to hardware manufacturers. Every network interface card, Wi-Fi adapter, or virtual NIC has a MAC address where the first half identifies the vendor and the second half is a unique serial number assigned by that vendor.
MAC address formats accepted
00:1A:2B:3C:4D:5EColon-separated (Linux/macOS default)
00-1A-2B-3C-4D-5EDash-separated (Windows default)
001a.2b3c.4d5eDotted hex (Cisco IOS format)
001A2B3C4D5ENo separator (raw hex)
Locally administered MAC addresses (bit 1 of the first octet set) and multicast addresses will not have a vendor entry.