Look up MAC address

Normalize a MAC address and look up its registered OUI organization.

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ToolMAC Address Lookup
Input
Output
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Preview

How it works

The first 24 bits are compared with the OUI registry, while local, multicast, and randomized flags are read from address bits. The registry cannot identify the current device owner.

  • OUI is the manufacturer registry key.
  • Device-specific bits are not publicly assigned.

Worked example

Look up VMware MAC address vendor
Identify the manufacturer and properties for a VMware virtual NIC MAC
Input
											00:0C:29:3E:4A:5B
Output
												Mac: 00:0C:29:3E:4A:5B
Mac dash: 00-0C-29-3E-4A-5B
Mac dot: 000C.293E.4A5B
Mac bare: 000C293E4A5B
Oui: 00:0C:29
Vendor: VMware
Is unicast: yes
Is multicast: no
Is universal: yes
Is local: no
Binary: 00000000:00001100:00101001:00111110:01001010:01011011

When to use this

Network inventory, Wi-Fi troubleshooting, and ACL normalization look up MAC prefixes.

Edge cases

  • Locally administered addresses may have no vendor match.
  • The multicast bit marks a non-unicast address.
  • Randomized Wi-Fi addresses can change across scans.

References