MAC Address Generator
Generate random MAC addresses with configurable separator, case, unicast/multicast, and locally administered address flags.
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How to Use This Tool
Configure the separator format, case, unicast/multicast, and locally administered flags, set how many addresses to generate (up to 20), then click Generate.
Common Use Cases
- Create test MAC addresses for network simulation labs
- Populate mock data for DHCP server testing
- Generate locally administered addresses for virtual machines
- Test network monitoring tools and dashboards
Frequently Asked Questions
What is a unicast vs multicast MAC address?
The least significant bit of the first octet determines the type. If it is 0, the address is unicast (sent to a single device). If it is 1, it is multicast (sent to a group). Most device MAC addresses are unicast.
What is a locally administered MAC address?
The second least significant bit of the first octet indicates whether the address is globally unique (0, assigned by the manufacturer) or locally administered (1, assigned by the user or software). Locally administered addresses are used in virtual machines and testing.
Are generated MAC addresses real device addresses?
No. These are randomly generated addresses for testing, development, and simulation purposes. They should not be used to impersonate real network hardware.