MAC address vendor lookup API
Overview
macaddress.io resolves any MAC address or OUI (Organizationally Unique Identifier) prefix to the hardware vendor that manufactured the network interface. The API returns the company name, address, block type, and additional metadata useful for network monitoring and asset inventory tools. A free tier is available with a limited number of daily lookups after registering for an API key.
Beginner Tip
Register at https://macaddress.io to receive a free API key. Pass the key via the X-API-Key header and the MAC address as the search query parameter. The MAC can be in any common format (colon-separated, hyphen-separated, or no delimiter). Start with a small test: look up "FC:FB:FB:01:FA:21" and you should get back a well-known vendor like Apple.
Available Data
Example Response
{
"status": "success",
"data": {
"result": "Data from MAC address vendor lookup",
"description": "Retrieve vendor details and other information regarding a given MAC address or an OUI",
"timestamp": "2025-01-15T10:00:00Z"
}
} Field Reference
vendorDetails.companyName Name of the company that owns this OUI block, e.g. "Apple, Inc.". vendorDetails.companyAddress Registered address of the vendor. vendorDetails.countryCode ISO 3166-1 alpha-2 country code of the vendor headquarters. blockDetails.blockFound Whether a matching OUI block was found in the IEEE database. blockDetails.blockSize Number of MAC addresses in the assigned block (e.g. 16777216 for a /8 block). macAddressDetails.isValid Indicates whether the provided MAC address is valid. Implementation Example
// ⚠️ Note: This URL may be a documentation page. Check official docs for actual API endpoint.
const url = "https://macaddress.io/api";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
headers: {
"X-API-Key": "YOUR_API_KEY"
}
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Matrix Score Breakdown
Partially tested on Apr 5, 2026
Technical Specifications
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