Blog

Guides and articles on MAC addresses, networking and IT tools.

What Is a MAC Address? A Complete Beginner's Guide

Learn what a MAC address is, how it is structured, how it differs from an IP address, and how to identify the manufacturer behind any MAC address.

What Is an OUI? How MAC Vendor Lookup Works

An OUI is the first half of a MAC address that identifies the manufacturer. Learn what an OUI is and how MAC vendor lookup turns a MAC into a company name.

MA-L, MA-M and MA-S: IEEE MAC Address Blocks Explained

The IEEE assigns MAC address blocks in three sizes: MA-L, MA-M and MA-S. Learn what each one means and how many addresses each block contains.

Randomized MAC Addresses: Why Your Phone Hides Its Real MAC

Modern phones use randomized (private) MAC addresses for privacy. Learn why, how to spot them, and what it means when a MAC lookup returns no vendor.