MAC Address Lookup

A MAC (Media Access Control) address is a unique hardware identifier assigned to every network interface (WiFi adapter, Ethernet port, Bluetooth radio). It is a 48-bit address written as six pairs of hexadecimal digits: AA:BB:CC:DD:EE:FF. The first three pairs identify the manufacturer; the last three are device-specific.

An OUI (Organizationally Unique Identifier) is the first 3 bytes (24 bits) of a MAC address, assigned by the IEEE to identify the manufacturer. For example, 00:1A:2B always belongs to the same company. The tool looks up the OUI in the IEEE registry to identify who made the network hardware.

The lookup reveals the manufacturer name (e.g., Apple, Intel, Samsung), their registered address, and the assignment block type (MA-L, MA-M, MA-S). This helps identify unknown devices on your network, verify hardware authenticity, and troubleshoot network issues by understanding what devices are connected.

Yes — MAC addresses can be changed in software on most operating systems. Modern devices (iOS 14+, Android 10+, Windows 10+) use randomized MAC addresses for WiFi scanning to protect privacy. A spoofed MAC address will not match the correct manufacturer in the lookup, which can help detect spoofing.

The tool accepts multiple formats: colon-separated (AA:BB:CC:DD:EE:FF), hyphen-separated (AA-BB-CC-DD-EE-FF), dot-separated (AABB.CCDD.EEFF), and no separators (AABBCCDDEEFF). It also accepts partial MAC addresses (first 3 bytes only) for OUI lookups. Both uppercase and lowercase hex digits work.