MAC Address Formatter & Vendor Lookup
Paste MAC addresses in any format. Instantly convert them between Cisco, Linux, and Windows formats, and perform offline OUI lookups to identify the hardware vendor automatically.
Paste MAC addresses (e.g., 00:1A:2B:3C:4D:5E, 001a.2b3c.4d5e) one per line.
Paste MAC addresses above and click Format & Lookup
to normalize them and identify vendors.
MAC Address Formats & Attributes
A MAC address is a 48-bit identifier, typically represented as 12 hexadecimal digits. Depending on the system or vendor, it can be written in several standard formats:
- Cisco (aaaa.bbbb.cccc): Uses three groups of four hexadecimal digits, separated by dots. Common on Cisco networking equipment.
- Linux/Standard (aa:bb:cc:dd:ee:ff): The IEEE 802 standard format, using six groups of two hexadecimal digits separated by colons. Widely used on Linux, macOS, and Unix systems.
- Windows (aa-bb-cc-dd-ee-ff): Similar to the standard format but uses hyphens instead of colons. Commonly used in Microsoft Windows command-line tools.
- Bare (aabbccddeeff): A contiguous string of 12 hexadecimal digits without any separators. Often used in automated scripts or low-level configurations.
Attributes
MAC addresses can have specific properties based on how their first octet is configured:
- UAA (Universally Administered Address): The address is assigned by the device manufacturer. It is globally unique and the hardware vendor can usually be identified via an OUI lookup.
- LAA (Locally Administered Address): The address is assigned by a network administrator or software, overriding the hardware's burned-in address. Commonly used for MAC spoofing, virtual machines, or local network management.
- Multicast: The address is intended for multicast communication (sending packets to multiple destinations simultaneously), rather than identifying a single physical network interface.