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MAC Address Lookup

Identify the manufacturer or vendor of any network device by looking up its MAC address. Instantly find device information using the OUI database.

Formats: AA:BB:CC:DD:EE:FF, AA-BB-CC-DD-EE-FF, AABBCCDDEEFF

OUI (First 3 Octets)

Full MAC Address

Manufacturer / Vendor

Country

Enter a MAC address and click Lookup to identify the manufacturer...

💡 How to Use This Tool

Identify device manufacturers from MAC addresses in seconds. Follow these simple steps:

1

Enter MAC Address

Type or paste a MAC address in any common format.

2

Click Lookup

Press the Lookup button or hit Enter to search.

3

View Results

See the manufacturer name, OUI, and country information.

4

Copy & Use

Copy the results for documentation or further analysis.

📖 About MAC Address Lookup

What is MAC Address Lookup?

MAC Address Lookup is a tool that identifies the manufacturer or vendor of a network device based on its MAC (Media Access Control) address. The first three octets (24 bits) of a MAC address form the Organizationally Unique Identifier (OUI), which is assigned to manufacturers by the IEEE.

Common Use Cases

Network Troubleshooting

Identify unknown devices on your network by looking up their MAC addresses to determine the manufacturer.

Security Auditing

Detect unauthorized or suspicious devices on your network by verifying device manufacturers against expected devices.

Device Inventory

Catalog network equipment by identifying manufacturers for documentation and asset management.

IT Support

Quickly identify device types when troubleshooting network issues or configuring equipment.

Key Features

Instant Lookup

Get manufacturer information immediately by entering any valid MAC address.

Multiple Format Support

Accepts MAC addresses in various formats: colon-separated (AA:BB:CC:DD:EE:FF), hyphen-separated (AA-BB-CC-DD-EE-FF), or without separators.

OUI Database

Uses the IEEE OUI database to identify over 40,000 registered manufacturers and vendors.

Privacy First

All lookups happen locally in your browser. Your MAC addresses are never sent to any server.

Understanding MAC Addresses

A MAC address consists of 6 octets (48 bits) typically displayed as 12 hexadecimal digits. The structure is:

  • First 3 octets (OUI): Manufacturer identifier assigned by IEEE
  • Last 3 octets: Device-specific identifier assigned by manufacturer

For example, in 00:1A:2B:3C:4D:5E, the OUI is 00:1A:2B.

❓ Frequently Asked Questions

Yes! This MAC address lookup runs entirely in your browser. Your MAC addresses are never sent to any server - all lookups happen locally using a bundled OUI database.
OUI (Organizationally Unique Identifier) is the first 3 octets (24 bits) of a MAC address. It identifies the manufacturer or vendor that produced the network interface card. The IEEE assigns these prefixes to companies.
This tool accepts MAC addresses in multiple formats: colon-separated (AA:BB:CC:DD:EE:FF), hyphen-separated (AA-BB-CC-DD-EE-FF), or without separators (AABBCCDDEEFF). Both uppercase and lowercase are supported.
A MAC address might not be found if it uses a locally administered address (LAA), which is randomly generated and not assigned by a manufacturer. Also, some newer OUI assignments may not be in our database.
Yes! This MAC address lookup tool is completely free with no usage limits. Look up as many MAC addresses as you need without any signup or registration.

Version History

1.0.0

Initial release

Jan 24, 2026