How to use
- Type or paste your addresses into the MAC addresses field, one per line. Results appear as you type.
- Choose AA:BB or aa:bb under Output case.
- Choose Colon (:), Hyphen (-), Cisco (.) or None under Separator.
- Click Copy to copy the result.
- Click Download CSV to save the results as a CSV file.
Examples
Look up an Apple address from a switch table
3c2e.ff12.3456
MAC: 3C:2E:FF:12:34:56 Organization: Apple, Inc. Prefix: 3C:2E:FF (/24, MA-L) Country: US Type: Universally administered, Unicast
Look up a small MA-S block
70-B3-D5-FD-F1-23
MAC: 70-B3-D5-FD-F1-23 Organization: NARA CONTROLS INC. Prefix: 70:B3:D5:FD:F (/36, MA-S) Country: KR Type: Universally administered, Unicast
Format a mixed address list in lowercase
3C:2E:FF:12:34:56 5A:2B:7C:11:22:33 FF:FF:FF:FF:FF:FF
# Input MAC Organization Prefix Block Country Flags 1 3C:2E:FF:12:34:56 3c-2e-ff-12-34-56 Apple, Inc. 3C:2E:FF MA-L US universal 2 5A:2B:7C:11:22:33 5a-2b-7c-11-22-33 Locally administered (not registered; often a random address) local 3 FF:FF:FF:FF:FF:FF ff-ff-ff-ff-ff-ff Broadcast address local, multicast, Broadcast address
FAQ
Why does my MAC address show no vendor?
A locally administered address may be randomized for privacy and have no registered manufacturer. A block assigned after the database snapshot may also be missing.
Can a MAC address identify a device, its owner or its location?
The lookup shows the organization an address block is registered to. It cannot identify a specific device, its owner or its location, or reveal the hardware MAC behind a randomized address.
Can I look up just an OUI?
Enter the first six hexadecimal digits to look up a 24-bit OUI. If the result names IEEE Registration Authority, enter the full MAC address to check for a more specific assignment.
Where does the vendor database come from?
It uses the IEEE Registration Authority public listings for MA-L, MA-M, MA-S, IAB and CID. The current snapshot is dated October 1, 2026; its date appears below the results.
Is my MAC address sent to your server?
Your MAC address is not uploaded or stored; the lookup runs in your browser. The page downloads static database files selected by one byte of the address prefix, so the server can see which byte-file was requested.