Can a MAC address reveal the device model?

A vendor lookup may associate a MAC prefix with an organization, but a MAC address alone generally does not reliably identify an exact device model.

Why does my MAC address show no vendor?

The address may be locally administered, randomized, multicast, special-purpose, or its prefix may not be available in the vendor database.

What is a randomized MAC address?

A randomized MAC address is a temporary or software-generated address that can be used to reduce tracking and may not correspond to the device hardware manufacturer.

Is this MAC Address Lookup free?

Yes. The MAC Address Lookup can be used online to validate and inspect supported MAC addresses.

Hardware Vendor Identifier

MAC Address Lookup

Q: What is a MAC address?

A MAC address is an identifier used by a network interface. A common MAC-48 address contains 48 bits and is usually displayed as six groups of hexadecimal characters.

Enter a MAC address to identify its registered vendor, OUI prefix and address characteristics. View normalized MAC formats and determine whether the address is universal, local, unicast or multicast.

Vendor Lookup

OUI Prefix

MAC Formats

Instant Analysis

MAC Hardware Identity ● Lookup Ready

Look Up a MAC Address

Enter a standard 48-bit MAC address to identify its vendor, OUI prefix and address properties.

MAC Address Lookup Vendor and OUI identification tool

Try an example

Looking up MAC address...

Checking the OUI prefix and address characteristics.

Vendor / Manufacturer

—

Vendor information based on the MAC address prefix.

OUI Prefix —

Delivery Type —

Administration —

Address Format 48-bit / EUI-48 style

Colon Format

—

Dash Format

—

Cisco / Dotted Format

—

Plain Hexadecimal

—

What Is a MAC Address?

A MAC address is an identifier associated with a network interface. A common 48-bit MAC address is displayed as six groups of hexadecimal characters, such as 00:1A:2B:3C:4D:5E.

For many universally administered addresses, the beginning of the address can identify an organization associated with the hardware address allocation.

What Is an OUI?

OUI stands for Organizationally Unique Identifier. In many traditional MAC addresses, the first 24 bits provide the prefix used to associate an address block with an organization.

Why Can a Vendor Be Unknown?

A vendor may not be available when the prefix is missing from the lookup database or when the MAC address is locally administered, randomized or otherwise not based on a globally assigned manufacturer prefix.

● ● ●

$ mac-lookup FC:FB:FB:01:FA:21

Normalizing address...
OUI: FC:FB:FB
Type: Unicast
Administration: Universal
Vendor: Vendor Found

✓ lookup complete

What Can MAC Lookup Help With?

Use a MAC lookup when reviewing hardware addresses, network inventory and device information.

Vendor Identification

Check whether the MAC prefix is associated with a known hardware vendor or organization.

OUI Inspection

Extract the first three bytes of a standard MAC address for quick OUI prefix inspection.

Network Inventory

Add vendor context when reviewing MAC addresses collected from authorized switches, routers or network inventories.

Format Conversion

View the same MAC address in colon, dash, dotted and plain hexadecimal formats.

Randomized MAC Detection

Check whether the address uses the locally administered bit, which can indicate a software-assigned or randomized address.

Troubleshooting

Use MAC details as additional context when diagnosing authorized local network devices and adapter information.

How to Use MAC Address Lookup

Identify MAC address details in three simple steps.

Enter the MAC

Paste a standard 48-bit MAC address using colon, dash, dot or plain hexadecimal formatting.

Run the Lookup

The tool validates the address, analyzes its control bits and checks the vendor database when appropriate.

Review Details

See the vendor, OUI, administration type, delivery type and normalized MAC formats.

MAC Address Lookup FAQs

Common questions about MAC addresses, OUI prefixes and vendor identification.

A MAC address is an identifier used by network interfaces. A common MAC-48 address contains 48 bits and is usually displayed as six groups of hexadecimal characters.

OUI stands for Organizationally Unique Identifier. Traditional manufacturer-assigned MAC addresses commonly use an organizational prefix at the beginning of the address.

Usually not. A vendor lookup can often associate a prefix with an organization, but the MAC address alone generally does not reliably identify an exact device model.

The address may be locally administered or randomized, or its prefix may not be available in the vendor lookup database.

A locally administered MAC address is assigned locally by software, an administrator or a device instead of relying on a universally administered hardware address.

Modern operating systems and mobile devices can generate temporary or randomized MAC addresses for privacy. These addresses may not map to the device's hardware manufacturer.

The tool accepts common colon-separated, dash-separated, dotted and plain 12-character hexadecimal MAC address formats.

Yes. You can use the MAC Address Lookup online to validate and inspect supported MAC addresses without creating an account.