MAC Address Formatter
Convert MAC addresses between colon, hyphen, and Cisco formats; flag locally-administered / multicast.
About this tool
Accepts any common MAC notation (`aa:bb:cc:dd:ee:ff`, `AA-BB-CC-DD-EE-FF`, `aabb.ccdd.eeff`, or just 12 hex characters) and returns it in every format. Also reads the Universal/Local and Individual/Group bits.
FAQ
- What does "locally administered" mean?
- Bit 1 of the first octet, when set, marks the MAC as locally assigned (e.g. by a virtualisation hypervisor) rather than from a vendor OUI block.