# What is a MAC address

MAC stands for Media Access Control, and a MAC address is a unique identifier assigned to a network interface controller (NIC). A NIC can be part of an Ethernet adapter, Wi-Fi module, or Bluetooth module used to connect a device to a network. Essentially, a MAC address serves as the hardware address of the network adapter.

Source: https://www.clickguard.com/help/glossary/what-is-a-mac-address
Published: 2026-04-18
Updated: 2026-04-18
Author: Nikola Pejic

MAC stands for **Media Access Control**, and a MAC address is a unique identifier assigned to a **network interface controller (NIC)**. A NIC can be part of an Ethernet adapter, Wi-Fi module, or Bluetooth module used to connect a device to a network. Essentially, a MAC address serves as the hardware address of the network adapter.

A typical MAC address consists of six groups of two hexadecimal digits, which may be separated by hyphens, colons, or sometimes displayed without separators:  

`00:0a:95:9d:68:16`

Without a MAC address, distinguishing between different network hardware adapters that share the same IP address would be impossible.  

## Is a MAC address accessible on the Internet?

A MAC address is an **internal identifier within a private network**, used to facilitate communication between devices. Typically, it is **not visible or accessible outside its local network segment**. The MAC address of a device on a global network is not available to other devices outside that network.

See also: [What is an IP address](https://www.clickguard.com/help/glossary/what-is-an-ip-address).

## Related articles

- [What is an IP address](https://www.clickguard.com/help/glossary/what-is-an-ip-address.md)