MAC Vendor (OUI) Lookup

Format any MAC address and read the properties encoded in it.

What you provide

Result

00:1A:2B:3C:4D:5E — universally administered unicast

The address is universally administered, so its first three bytes are a real IEEE vendor prefix. Look it up in the vendor tool to name the manufacturer.

Diagnostic telemetry
Colon notation
00:1A:2B:3C:4D:5E
Hyphen notation
00-1A-2B-3C-4D-5E
Cisco notation
001a.2b3c.4d5e
OUI (vendor prefix)The first three bytes, assigned to a manufacturer by the IEEE
00:1A:2B
AdministrationBurned in by the manufacturer
Universally administered
Cast
Unicast

What this cannot tell you

  • Reads the properties encoded in the address itself. It does NOT name the manufacturer — that needs the IEEE vendor database, which the vendor-lookup tool carries separately.
  • A locally-administered address has no real vendor behind it, so its prefix identifies nothing.

Take this with you

MAC Vendor (OUI) Lookup on RunTheTests — free browser-based netmath tools, no sign-up.