Files
- macvendorcheck-oui.csv - columns: assignment, vendor, registry (MA-L/MA-M/MA-S), country.
- macvendorcheck-oui.json - array of objects with the same fields.
What is included
54,164 IEEE registry assignments covering 30,315 vendors, combining the MA-L, MA-M and MA-S registries. Rebuilt from the IEEE's published registries every month; this export always matches what the lookup and the API serve.
License
The underlying registry data is published by the IEEE. Our compiled export is free for any use, personal or commercial; a link back to macvendorcheck.com is appreciated but not required.
Prefer an API?
If you need live lookups instead of a file, the free JSON API needs no key: GET /api/mac/{address}.