Free tool · No upload · No sign-up

Bulk MAC Address Lookup

Paste any list — switch tables, DHCP leases, NAC exports, CSVs — and get the vendor for every MAC against the full IEEE registry (MA-L, MA-M and MA-S blocks). Randomized/locally-administered addresses are flagged, which is exactly what you need mid-NAC-rollout. Lookups run entirely in your browser: your MAC list is never uploaded anywhere.