OUI Lookup and Database

OUI Lookup and Database

Overview

• OUI Lookup and Database is a comprehensive utility designed for network administrators, cybersecurity professionals, and hardware enthusiasts who need to identify the origins of networked devices.

• By utilizing Organizationally Unique Identifiers, this tool bridges the gap between raw hardware addresses and manufacturer identities.

Manufacturer Identification and Search

• Users can instantly determine the manufacturer of any device by entering its MAC address into the search interface.

• The application supports reverse lookup, allowing users to input a company name to retrieve all OUI prefixes currently assigned to that specific manufacturer.

• This bidirectional search capability is essential for auditing network traffic and identifying unauthorized hardware.

Data Integrity and Portability

• The application utilizes a database sourced directly from the Institute of Electrical and Electronics • Engineers to ensure the highest level of accuracy and compliance with global standards.

• The tool is designed for complete offline functionality, making it ideal for use in secure environments or remote locations where internet access is restricted.

• An active internet connection is only required when the user chooses to synchronize and update the local database with the latest IEEE registry entries.

Advanced Productivity Features

• The bulk lookup engine allows for the simultaneous processing of multiple addresses.

• It recognizes various delimiters, including commas, semicolons, whitespace, and new lines.

• Intelligent clipboard integration automatically detects MAC addresses when the application is opened, facilitating a seamless auto-paste workflow that reduces manual data entry.

User Interface and Personalization

• The software includes comprehensive support for dark theme mode, providing a high-contrast, comfortable viewing experience for users working in low-light environments.

• The interface is optimized for speed and clarity, ensuring that critical vendor information is presented without unnecessary complexity.

FAQ

Q: How does the OUI Lookup and Database tool work?

A: The utility reads a locally stored copy of the IEEE‑maintained OUI registry. When you type or paste a MAC address, the program extracts the first three octets, matches them against the database, and displays the corresponding vendor name. The same process works in reverse: you enter a company name and the tool returns every OUI block assigned to that organization.

Q: Do I need an internet connection to use the application?

A: No. All lookups are performed against the offline copy of the IEEE registry that resides on your computer. You only need to go online if you want to download the latest OUI updates.

Q: How often should I update the OUI database?

A: IEEE publishes new assignments and changes regularly. For most environments a quarterly update is sufficient, but if you work in a fast‑changing industry (e.g., IoT deployments) you might prefer a monthly sync. The tool will remind you when a newer version is available.

Version History

v1.6.6——24 Aug 2026

Find a device's manufacturer by its MAC address and browse OUIs assignments Download the latest version of OUI Lookup and Database to enjoy new features and updates immediately!

*1.6.6

* Network db update restored

* Added organization details on tap

* Bundled OUI list updated @ 2026-05-15

* Dependencies update

*1.6.5

Added support for Android 16 and 15

Bundled OUI list updated @ 2025-07-15

Dependencies update

Dropped support for Android versions below 8

*1.6.4

Bundled OUI list updated @ 2024-06-15

Fixed crash when opening settings