MAC address generator
Generate random MAC addresses in the separator format you need.
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About the mac address generator
Generates random MAC addresses in colon, hyphen, Cisco dotted or bare format. The multicast bit is always cleared so the result is a valid unicast address, and the locally-administered bit can be set to mark it as not factory-assigned.
Frequently asked questions
What is the locally administered bit?
The second-lowest bit of the first byte. Setting it declares the address as locally assigned rather than IEEE-registered, which is the correct convention for virtual machines and containers.
Will a random MAC collide on my network?
Only the last three bytes need to be unique within a broadcast domain, giving sixteen million combinations. A clash is possible in theory and essentially unheard of in practice.