Random MAC Address Generator — Free Online MAC Address Generator
Generate random locally-administered MAC addresses for virtual machines, network testing, and development.
Frequently Asked Questions
MAC Address Generation for Network Development and Testing
MAC addresses are the Layer 2 identifiers of network interfaces. Every physical and virtual network adapter requires a unique MAC for proper local network communication. When deploying virtual machines, containers, or network simulations, generating unique MAC addresses prevents conflicts and ensures correct ARP resolution.
Generated MACs use the locally administered flag (U/L bit set to 1) which signals they are not assigned by an IEEE-registered manufacturer. This prevents conflicts with real hardware MACs that carry OUI prefixes assigned to companies like Intel, Apple, or Cisco. The unicast bit (I/G bit set to 0) ensures they represent single network interfaces rather than multicast groups.
VMware uses the 00:50:56 OUI for its virtual machines. VirtualBox uses 08:00:27. Hyper-V uses 00:15:5D. Docker generates random locally-administered MACs for container network interfaces. This tool generates the same format suitable for any virtualization platform.