Random MAC Address Generator
Generate single or bulk MAC addresses with OUI prefix support, first-octet bit controls, multiple formats, and instant export.
No fixed OUI prefix
Why Teams Use This Random MAC Address Generator
Bulk generation up to 500
Create large datasets of randomized MAC addresses instantly for test fixtures and mock traffic.
Bit-level controls
Toggle multicast/unicast and locally-administered/global bits for realistic networking scenarios.
OUI prefix support
Lock vendor-style prefixes and optionally preserve the prefix bits exactly as entered.
Multiple output styles
Export as TXT, CSV, or JSON and choose separator format (colon, hyphen, dot, none).
Practical Use Cases
- ✓Network simulation
Generate synthetic device identities for packet testing and router log validation.
- ✓QA automation
Create repeatable batches of MAC addresses to test input validation rules.
- ✓Training labs
Use realistic OUI prefixed addresses for classroom and SOC lab exercises.
Frequently Asked Questions
Can this MAC address generator create valid unicast or multicast addresses?
Yes. You can explicitly toggle the multicast bit and locally administered bit in the first octet to create unicast/global, unicast/local, multicast/global, or multicast/local combinations.
What happens if I enter an OUI prefix?
The tool locks your prefix bytes, then randomizes the remaining bytes. You can also preserve prefix bits as-is so the first octet does not get modified by the bit toggles.
Can I generate MAC addresses for CSV import?
Yes. Use the CSV export button to download index and MAC address rows for spreadsheets, scripts, and test data pipelines.