Make random locally administered MAC addresses that never clash with a real vendor
Runs in your browser. Nothing you type is sent anywhere. Checked against sources on 17 Oct 2026.A made-up MAC for a virtual machine, a container or a test should have the Local bit set and the Group bit clear, so it can never equal a manufacturer's address or act as multicast. Each one here is random with a second hex digit of 2, 6, A or E, in the notation you choose, drawn from your browser's secure random source.
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Every network tool prints MAC addresses its own way: Linux and macOS use colons, Windows uses hyphens, Cisco switches group four digits with dots, and databases often store 12 bare digits. Paste any of them, or an 8-byte EUI-64, and get all the others at once, in capitals or small letters.
A second hex digit of 2, 6, A or E means a locally administered unicast address, as used by virtual machines, Docker and phones that randomise their MAC per network. The page also names the special blocks: broadcast FF-FF-FF-FF-FF-FF, 01-00-5E IPv4 multicast, 33-33 IPv6 multicast, and IANA's 00-00-5E range with its documentation addresses.
Random MACs. Generate locally administered unicast addresses for test networks; they cannot collide with a manufacturer's address.
The rest of the article, and all 6 questions about MAC Address Converter, are on the MAC Address Converter page.
A MAC whose first byte has the 02 bit set, which makes the second hex digit 2, 6, A or E. Software assigned it rather than the manufacturer: virtual machines, containers, bonded interfaces and phones that randomise their address per Wi-Fi network all use such addresses.
Look at the lowest bit of the first byte: when it is 1, the second hex digit is odd and the address is a group address that many devices listen to. 01-00-5E addresses carry IPv4 multicast, 33-33 addresses carry IPv6 multicast, and FF-FF-FF-FF-FF-FF is the broadcast address.
Yes, when the address was built from a MAC without privacy extensions: its interface identifier then has ff:fe in the middle, as in fe80::200:5eff:fe00:5301. Paste the address and the MAC is rebuilt. Random privacy and stable-privacy addresses contain no MAC, and the page says so.
No. The first three bytes, the OUI, are shown, but naming the vendor needs the IEEE registry of several hundred thousand entries, which is not bundled. A locally administered or randomised MAC has no vendor at all, because software chose the number.
Rates and rules change; check the source before you rely on a figure.
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Same job, other tools: IP to ASN Lookup – Map an IP address to the ASN that announces it, with the BGP prefix · IP WHOIS Lookup – Who holds an IP address: network name, range, organisation and country as registered.