Paste the MAC address into the utilAZ lookup tool. It extracts the first 3 bytes (OUI), queries the IEEE registry, and returns the registered manufacturer name, company address, and assignment date. For example 00:1A:2B resolves to a specific vendor instantly.

Enter any MAC address in formats like AA:BB:CC:DD:EE:FF, AA-BB-CC-DD-EE-FF, or AABBCCDDEEFF into the utilAZ MAC lookup tool and click Search. The tool auto-detects the format, validates the address, and returns the vendor information from the IEEE OUI database in under a second.

OUI (Organizationally Unique Identifier) is the first 24 bits (3 bytes) of a MAC address. IEEE assigns each OUI block to a single manufacturer. The remaining 24 bits are assigned by that manufacturer to individual devices. There are also MA-M (28-bit) and MA-S (36-bit) assignments for smaller vendors.

Run 'arp -a' or 'ip neigh' to list MAC addresses on your LAN. Paste each unknown MAC into the lookup tool to identify the manufacturer. Combined with the IP address and open ports, this reveals whether the device is a phone, IoT sensor, printer, or rogue access point.

The OUI reveals the manufacturer (e.g. Apple, Samsung, Cisco) which strongly suggests device type. However, the MAC alone cannot distinguish an iPhone from a MacBook if both share the same OUI block. Combine with mDNS names or DHCP fingerprints for precise identification.

MAC lookup returns the registered company name, postal address, country, OUI assignment block type (MA-L, MA-M, MA-S), assignment date, and whether the address is locally administered or randomized. Some entries also include product line hints from the vendor's public documentation.