Enter a MAC Address
Convert Between Colon, Hyphen & Cisco Notation • 100% Local
A MAC address is 6 bytes (48 bits), and different tools and vendors write those same 6 bytes differently — colon-separated (00:1A:2B:3C:4D:5E, the most common general convention), hyphen-separated (00-1A-2B-3C-4D-5E, common on Windows), Cisco's dot notation (001a.2b3c.4d5e, three groups of four), or with no separator at all. This tool accepts any of those as input and converts to whichever format you need, in upper or lower case.
The Bit Info shown for a single address is derived directly from the first byte, not looked up from any database: the last bit of the first byte (the "I/G" bit) indicates whether the address is Unicast (a single specific device) or Multicast (a group — this includes the all-ones broadcast address FF:FF:FF:FF:FF:FF) — and the second-to-last bit (the "U/L" bit) indicates whether the address is Universally Administered (permanently assigned by the manufacturer, per the IEEE-registered OUI) or Locally Administered (manually set — this is common for virtual machines, VPNs, and randomized/private MAC addresses that operating systems now generate for Wi-Fi privacy).
This tool does not attempt to identify the device manufacturer from the address — that would require looking up the first 3 bytes against IEEE's full OUI registry, which is outside what this lightweight, fully local tool covers.