MAC Address Lookup & OUI Vendor Checker
Identify network card manufacturer, OUI vendor, and MAC address casting scope.
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How to Use the MAC Address Lookup: OUI Vendor & Hardware Checker
- 1Enter the 12-character MAC address (e.g. 00:1A:2B:3C:4D:5E or B827EB123456).
- 2Review the identified hardware manufacturer (e.g. Apple, Cisco, Raspberry Pi).
- 3Check whether the address is Unicast (direct communication) or Multicast (group broadcast).
- 4Verify whether the address is globally unique (UAA) or locally administered (LAA).
Formula & How It Works
IEEE 802 MAC Address Bitmasking
Extracts the top 24 bits for OUI lookup and checks lower bits of octet 0.
Worked Examples
Looking up B8:27:EB:4A:5B:6C
Input: B8:27:EB:4A:5B:6C
Explanation: B8:27:EB is assigned to Raspberry Pi Foundation; least significant bit is 0 (unicast).
Frequently Asked Questions
What is an OUI in a MAC address?▼
An Organizationally Unique Identifier (OUI) is a 24-bit globally unique number assigned by the IEEE to hardware manufacturers.
Can two devices share the same MAC address?▼
Factory-burned addresses are globally unique, though software MAC cloning or randomized private MACs can cause duplicates if misconfigured.
How do you find your computer's MAC address?▼
On Windows, run 'getmac' or 'ipconfig /all' in CMD; on macOS/Linux, run 'ifconfig' or 'ip link' in Terminal.
What is a randomized private MAC address?▼
Modern smartphones and laptops generate rotating random MAC addresses when connecting to Wi-Fi to prevent tracking across public networks.
Quick Reference & Conversion Table
| OUI Prefix | Registered Vendor | Common Devices | Hardware Category |
|---|---|---|---|
| B8:27:EB | Raspberry Pi Foundation | Raspberry Pi 3 / Zero | Single Board Computers |
| F0:18:98 | Apple, Inc. | iPhone / MacBook Pro | Consumer Electronics |
| FC:FB:FB | Cisco Systems | Catalyst Switches / Routers | Enterprise Networking |
| 00:14:22 | Dell Inc. | PowerEdge Servers / OptiPlex | Enterprise Computers |
⚠️ Common Pitfalls to Avoid
- •Entering an IP address instead of a physical layer MAC hardware address.
- •Confusing locally spoofed MAC addresses with factory-burned universal hardware OUIs.
💡 Practical Real-World Uses
- •Configuring DHCP static IP reservations and port security on network switches.
- •Auditing rogue devices connected to corporate enterprise Wi-Fi networks.
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