MAC Address Format Converter

About this calculator

A MAC (Media Access Control) address is the 48-bit hardware identifier burned into every network interface — Ethernet cards, Wi-Fi chips, Bluetooth radios. Different vendors and platforms write the same 12 hex digits differently: colon-separated (00:1A:2B:3C:4D:5E) is common on Linux and most networking gear, hyphen-separated on Windows, and Cisco devices use dotted groups of four (001A.2B3C.4D5E).

This converter normalizes a MAC address between those notations and also pulls out its OUI (Organizationally Unique Identifier) — the first 24 bits, which IEEE assigns to the manufacturer, so the OUI alone can identify whether a device is made by, say, Apple, Cisco, or Intel. Useful for network administrators comparing device logs, configuring ACLs, or troubleshooting hardware across mixed-vendor environments.