MAC Address Lookup

Identify vendors and analyze MAC address bits.

Input

When to use MAC Address Lookup

Common ways to use MAC Address Lookup:

  • Vendor identification

    Look up which manufacturer produced a network device from its MAC address.

  • Multicast and local bit analysis

    Interpret the multicast and locally administered bits to understand address scope.

  • Network troubleshooting

    Diagnose duplicate MACs, rogue devices, or unexpected traffic on your network.

  • Documentation and tickets

    Copy clean vendor and OUI details into documentation or support tickets.

  • Mobile usage

    Run the same lookup on phone and tablet without installing software.

Frequently Asked Questions

How do I use this app?
Enter or paste a MAC address, click Lookup, and review the vendor, OUI, and bit analysis in the results panel. Use the sample chips to try common examples.
Is this app free to use?
Yes. The app is free to use and does not require an account.
What happens to my input data?
The app does not store user-provided input. All processing happens locally in your browser.
Why is the vendor not found?
The OUI prefix may not be present in the local database. The address is still valid; only the vendor name is unavailable.
What do the multicast and locally administered bits mean?
The first octet's least significant bit indicates multicast (1) or unicast (0). The second least significant bit indicates locally administered (1) or globally unique (0).