MAC Address Generator

The MAC Address Generator produces random, syntactically valid MAC addresses — six pairs of hex digits, with control over the OUI prefix (vendor bytes), the locally administered / universally administered bit, and the unicast / multicast bit. Generate one MAC or a batch of hundreds in any common delimiter format: colon (`00:1A:2B:3C:4D:5E`), dash (`00-1A-2B-3C-4D-5E`) or Cisco-dot (`001A.2B3C.4D5E`).

Network engineers, security researchers, virtualization admins and QA engineers all need MAC addresses. Cluster tests need unique MACs for every virtual NIC. DHCP testing needs a stream of never-before-seen MACs. Penetration testers need to spoof a MAC to test 802.1X access controls. Docker and Kubernetes networking work needs deterministic MACs for reproducible builds.

By default the generator sets the locally administered bit, so the resulting MACs are safe to use in test environments without accidentally colliding with real hardware OUIs. You can also pin a specific vendor OUI to generate MACs that look like real Intel, Apple or Broadcom hardware for compatibility testing.