MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
API Key Registration is No Longer Available
Registration of new API keys has been discontinued. New API keys can no longer be generated.
The MACLookup API is now fully open and free for all users under a single unified rate limit, with no registration required.
Current Rate Limits
| All users | 10 requests/sec | 25 K requests/6h |
Existing API Key Holders
If you already hold an API key, your enhanced rate limits remain active until April 2027. After that date, all users will be subject to the unified rate limits above.
| Legacy API Key (until April 2027) | 50 requests/sec | 1.0 M requests/day |
For more details see the Rate Limits page.