Network Tools

MAC Lookup

Look up vendor information for MAC addresses.

Supported formats:AA:BB:CC:DD:EE:FFAA-BB-CC-DD-EE-FFAABB.CCDD.EEFFAABBCCDDEEFF
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Enter a MAC address to look up the vendor

What is MAC Address Lookup?

MAC address lookup identifies the manufacturer of a network device from its MAC address (OUI - Organizationally Unique Identifier).

MAC Address Format

  • 6 bytes (48 bits)
  • Format: XX:XX:XX:XX:XX:XX
  • First 3 bytes: Manufacturer ID

Use Cases

  • Device identification
  • Network inventory
  • Security auditing

Frequently Asked Questions

What can a MAC address prefix tell me?
The first 3 bytes (the OUI, Organizationally Unique Identifier) are assigned by the IEEE and identify the NIC vendor. This tool resolves prefixes against the public IEEE database and can search a vendor’s assignments — handy for "whose device is this on my LAN".
Is the listed vendor the device brand?
Not necessarily. The OUI identifies the chip or module maker: an ASUS router using a Broadcom reference design shows up as Broadcom. Treat OUI as a supply-chain lead, not a brand verdict.
Are MAC addresses a privacy concern?
This tool only needs the prefix. Related note: phones use "randomized MAC" per Wi-Fi network precisely to prevent tracking by address; for administration, find the real address in the phone’s settings.