MAC address vendor lookup
Find the hardware manufacturer behind any MAC address, from its OUI.
Only the OUI is sent to the vendor database. Queries are not stored.
How to look up a MAC address
- Enter a MAC address. Paste a MAC address in any format, e.g. 3C:5A:B4:11:22:33.
- Resolve the vendor. We look up the OUI in the public vendor database.
- See the result. View the manufacturer and the address flags.
About MAC addresses and OUIs
Every network interface ships with a MAC address, and its first half is an OUI that the IEEE assigns to the manufacturer. Looking it up is handy for inventorying devices on a network, spotting an unexpected gadget on your Wi-Fi, or identifying hardware from a packet capture. Bear in mind that phones and laptops increasingly randomize their MAC for privacy, so a randomized address will not resolve to a real vendor. For radio devices, the FCC ID lookup identifies the certified product, and the ASN lookup covers networks.
Frequently asked questions
- A MAC address starts with a 3-byte OUI (Organizationally Unique Identifier) that is registered to a hardware manufacturer. This tool resolves that OUI to the vendor name.
- Just the first three bytes (the OUI). You can paste the full address in any common format — colons, dashes, dots or none — and only the OUI is used.
- They are flags in the first byte. A locally administered address was set by software (not the manufacturer), and a multicast address targets a group rather than one device — neither maps to a vendor.
- The OUI may be unregistered, randomized for privacy (common on phones), or locally administered. Modern devices often randomize their MAC when scanning Wi-Fi.
- No. Only the OUI is sent to the vendor database through our server. Nothing is saved.