Look up MAC address vendors instantly using the IEEE OUI database. Identify device manufacturers from any MAC format.
MAC Address Lookup
Look up MAC address vendors instantly using the IEEE OUI database. Identify device manufacturers from any MAC format.
MAC Address Search
MAC Address Lookup
Vendor Information
No Vendor Lookup
Enter a MAC address and click "Lookup Vendor" to see manufacturer details.
MAC Address Lookup Tips
- • OUI Database: First 3 bytes identify the manufacturer (Organizationally Unique Identifier)
- • Format Flexibility: Enter MAC in any format - colon, hyphen, dot notation, or plain hex
- • Vendor Detection: Instantly identify device manufacturer from network adapters
- • Address Analysis: See unicast/multicast type and local/universal administration
- • Network Troubleshooting: Perfect for identifying devices on your network
About MAC Address Lookup
When an unknown device appears on your network, the fastest way to identify it is by its MAC address. The first three bytes (the OUI) are registered with the IEEE and map directly to the hardware manufacturer, telling you whether that mystery endpoint is a printer, an IP phone, a virtual machine NIC, or a rogue device.
This tool queries the IEEE OUI registry entirely in your browser - no data is sent to any server. Paste a MAC in any common format (colon, hyphen, dot, or plain hex) and get the registered vendor name instantly. Use it for network audits, incident response, BYOD policy checks, or simple curiosity about what is connected to your LAN.
- Accepts colon, hyphen, dot (Cisco), and plain hex MAC formats
- Instant vendor identification from the IEEE OUI database
- Runs entirely in your browser - no MAC data leaves your device
- Useful for network audits, troubleshooting, and device inventory
- Supports partial OUI lookups (first 3 bytes only)
How to Use MAC Address Lookup
- Enter MAC Address - Paste or type the MAC address you want to lookup
- Supported Formats - Works with formats like AA:BB:CC:DD:EE:FF, AA-BB-CC-DD-EE-FF, or AABBCCDDEEFF
- Click Lookup - Get vendor information and manufacturer details
- View Results - See company name, address, and registration details
Frequently Asked Questions
How to find manufacturer from mac address?
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.
How to lookup mac addresses online?
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.
What is oui in mac address?
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.
How to identify unknown devices on the network?
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.
Can I find device type from mac address?
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.
What information can mac lookup give?
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.
Common Use Cases
- Network device identification
- Security audit and monitoring
- Inventory management
- Troubleshooting network issues
- Device discovery and mapping
- Asset tracking
- Forensic analysis
- Network administration
Technical Details
MAC Address Structure:
- OUI (24 bits): First 3 bytes identify the manufacturer
- NIC (24 bits): Last 3 bytes are assigned by manufacturer
- Format: Usually displayed as XX:XX:XX:XX:XX:XX or XX-XX-XX-XX-XX-XX
- Scope: Locally unique on network segments
- Types: Unicast, multicast, and broadcast addresses
Finding MAC Addresses
Windows:
ipconfig /all
getmac /v
arp -a
Linux/macOS:
ifconfig
ip link show
cat /sys/class/net/*/address
Network Discovery:
arp -a
nmap -sn 192.168.1.0/24
arp-scan -l