Random MAC Address Generator

Generate RFC-friendly locally-administered MAC addresses in colon, dash, Cisco-dot, or bare format

Count:

Separator:

Generated output

Output will appear here...

What is Random MAC Address Generator

Written by Giorgos Kostas. Last reviewed: April 18, 2026

Random MAC Address Generator mints MAC-48 addresses with the locally-administered bit set (second-least significant of the first byte), so they won't collide with real IEEE-assigned addresses.

Choose from colon, dash, Cisco-style dot, or bare output to match your tooling.

Why use it

Seed networking labs with safe MAC addresses.
Fixture DHCP / ARP tests.
Prototype inventory UIs without real devices.
Teach MAC address notation.
Validate format parsers.

Features

Locally-administered bit set
Colon / dash / dot / bare
Uppercase hex
Up to 1,000 per batch
Random MAC Address never leaves your machine

How to use Random MAC Address Generator

Pick separator. Colon, dash, Cisco dot, or bare.
Set count. Up to 1,000 addresses.
Run. Copy the list.

Example (before/after)

Input

Output (separator=colon, count=3)

02:A3:7F:11:C4:89
1A:B5:0C:D7:E2:46
3E:91:2D:7A:F8:50

Common errors

Multicast bit

Bit 0 of the first byte marks multicast.

Fix: This tool always sets locally-administered and keeps unicast.

Collision risk

MAC addresses can theoretically collide.

Fix: Use only in test environments — not production.

FAQ

Are these safe to use in labs?

Yes — the locally-administered bit is always set.

Which separators are supported?

Colon (`:`), dash (`-`), Cisco dot (`.`), and bare.

Is the case uppercase?

Yes — uppercase hex is more readable in lab output.

How many per batch?

Up to 1,000 addresses.

Is input uploaded?

No — MAC addresses are assembled from local RNG bytes and stay on this device.

Related tools

Pair with IP, hex, and string tools. You can also browse the full Random Content Generators category for more options.

Random IP Generator

Generate random IP addresses

Random Hex String Generator

Generate cryptographically strong random hex strings — ideal for IDs, tokens, and test fixtures

Random String Generator

Generate random alphanumeric, hex, letter, or symbol-included strings with configurable length and charset

Random Boolean Generator

Flip a virtual coin — outputs true/false, yes/no, heads/tails, 1/0, or on/off

IP Address Converter

Convert IP addresses between formats

Random Number Generator

Generate random numbers

Random Date Generator

Generate random dates

CIDR Calculator

Calculate network, broadcast, usable hosts, subnet mask, and wildcard for any IPv4 CIDR

IPv6 to Binary

Convert IPv6 address to binary

Line Shuffler

Randomise the order of lines in any multi-line text

Password Generator

Generate strong passwords with adjustable length and character types. Includes a real-time strength meter and copy button for quick password creation.

UUID v4 Generator

Generate UUID v4 (random) identifiers