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MAC address formatter

Format a 48-bit MAC address and inspect its bytes and address flags.

MAC address workbench02:1A:2B:3C:4D:5E
Byte 1 · 8 bits00000010
Group / individual flagUnicast
Administration flagLocally administered (U/L = 1)

Flags come from the first byte. They do not identify a manufacturer.

Processed on your device

How it works & useful details

How it works & limits

Accepts six colon- or hyphen-separated hex pairs, three dotted groups, or twelve hexadecimal digits. Output preserves all 48 bits; it only changes the notation and letter case.

The low two bits of the first byte indicate group/individual and local/universal administration. These are bit flags, not evidence of a vendor or device identity. This tool does not perform vendor lookups, generate addresses, or determine whether an address is assignable.

Your working space

Explore the live view, then save copyable text and a downloadable file. Everything is calculated locally. Inputs are not stored; refreshing clears them.

These tools inspect address notation and ranges. They do not contact addresses, check availability or establish connectivity.