- 1Choose file
- 2Adjust
- 3Download
MAC Address Vendor Lookup online, free
Identify network hardware manufacturer from MAC address OUI prefixes.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
- TXT
How to use MAC Address Vendor Lookup · MAC Address Vendor Lookup — frequently asked questions
How to use MAC Address Vendor Lookup
- 1
Add your TXT file
Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.
- 2
Fine-tune the settings
The defaults already suit most files; change them only if you need to.
- 3
Run MAC Address Vendor Lookup
Press the start button. Processing happens on your device, usually in seconds.
- 4
Download the result
Save the finished file, or continue with another tool without downloading in between.
What MAC Address Vendor Lookup can do
- Private by design — files are processed in your browser and never uploaded
- Free with no sign-up, no watermark and no daily limit
MAC Address Vendor Lookup — frequently asked questions
What is an OUI (Organizationally Unique Identifier)?
An OUI is the first 24 bits (three octets) of a MAC address assigned by IEEE to hardware manufacturers to uniquely identify network interface cards.
Which MAC address formats are accepted?
The tool accepts standard colon notation (00:1A:2B:3C:4D:5E), hyphen notation (00-1A-2B-3C-4D-5E), dot notation (001A.2B3C.4D5E), or raw hexadecimal strings.
Does this tool send my MAC address across the internet?
No. The MAC lookup database runs entirely client-side inside your browser engine. Your device MAC addresses never leave your local system.
Can this tool detect randomized MAC addresses?
Yes. Modern smartphones and operating systems use randomized MAC addresses for Wi-Fi privacy. The tool detects locally administered address bits (LAA).
Is there any daily search limit?
No. Because processing is executed completely on-device, you can perform unlimited lookups offline and free forever.
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