About macaddresslookups.com

What We Do

macaddresslookups.com is a free, publicly accessible tool that lets anyone look up the manufacturer behind any MAC address or OUI (Organizationally Unique Identifier). Whether you are a network engineer, IT professional, security researcher, or simply curious about a device on your network, our tool gives you instant access to vendor information from the official IEEE registration database.

Our Data Source

All data is sourced directly from the IEEE Standards OUI Registry, the authoritative global registry for MAC address assignments. We import the complete MA-L (OUI), MA-M, MA-S, CID, and IAB assignment files and make them searchable through a fast, clean interface.

Our database is refreshed regularly to include the latest vendor registrations. Each update captures new entries and changes, so you always get accurate, up-to-date information.

What You Can Do

• Search by MAC address in any format — colon-separated, hyphen-separated, plain hex, Cisco dot notation
• Search by vendor or company name to find all assigned MAC prefixes
• View block type details (MA-L, MA-M, MA-S, CID, IAB) for each entry
• Download the complete database in CSV, JSON, or XML format
• Browse recently updated entries to track the latest IEEE assignments

Who Uses This Tool

Our tool is used by network administrators identifying unknown devices on their networks, security professionals conducting audits and incident response, developers building network management tools, students learning about networking, and anyone curious about the hardware they interact with every day.

Advertising

This website is supported by advertising. We participate in the Google AdSense program. Advertisements are clearly presented and do not interfere with the core functionality of the tool. We do not endorse any specific advertised product or service.

Contact Us

Have a question, suggestion, or found an issue? We'd love to hear from you. Visit our Contact page to get in touch.