MAC address vendor lookup
APIFree MAC address and OUI vendor lookup API
Overview
This API provides RESTful endpoints to retrieve vendor details and metadata for a given MAC address or OUI (Organizationally Unique Identifier). The primary endpoint accepts formatted/unformatted MAC/OUI strings and returns structured JSON responses including vendor name, physical address, country code, and OUI block information. Use cases include integrating device identification into network monitoring tools, IoT device management platforms, security apps to detect unauthorized devices, or inventory systems to categorize hardware by manufacturer. It supports partial MAC lookups via OUI prefixes and optional field filtering for efficient data retrieval.
Example Integration (JavaScript)
fetch('https://macaddress.io/api')
.then(res => res.json())
.then(data => console.log(data))
.catch(err => console.error(err)); Key Features
- RESTful architecture
- JSON response format
- MAC address & OUI lookup
- Field filtering options
- Supports multiple MAC formats
Frequently Asked Questions
? Is MAC address vendor lookup free to use?
Yes, it offers a freemium model—free tier with limited daily requests, and paid tiers for higher volume and advanced features like bulk lookups.
? Does it require an API Key?
Yes, all requests need an API key, which you can obtain by signing up for a free account on the macaddress.io website.
? What is the response format?
The API returns responses in JSON format, including fields such as vendor name, address, country code, and OUI block details.
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Tool Info
Pros
- ⊕ Accurate vendor data
- ⊕ Easy-to-integrate endpoints
- ⊕ Freemium tier available
- ⊕ Regularly updated OUI database
Cons
- ⊖ Free tier has rate limits
- ⊖ Requires API key for all requests
- ⊖ Advanced features locked behind paid plans