Random MAC Address Generator Online — Locally Administered MACs
Generate up to 50 random locally administered unicast MAC addresses with browser cryptographic randomness.
About this tool
The generator creates six random bytes, sets the locally administered bit and clears the multicast bit, then outputs uppercase colon-separated addresses.
How to use
- Enter the required count up to 50.
- Generate addresses.
- Use only in authorized test or virtual networks.
Features
- Cryptographic randomness.
- Local unicast bit settings.
- 1–50 addresses.
Common use cases
- Configure virtual machines.
- Create network test fixtures.
- Lab MAC allocation.
Common issues and tips
- Generated values are not vendor OUIs.
- Check for collisions in the actual network.
Privacy
Generation runs locally.
Frequently asked questions
Are these globally assigned MACs?
No, they are locally administered.
Are they multicast?
No, the multicast bit is cleared.
Are collisions impossible?
No. Verify uniqueness in your environment.