MAC Address Generator Free Online Tool 2026

Last updated March 22, 2026

Generating a Random MAC Address

Generate a single random valid MAC address for testing:

Settings: Random, locally administered, colon format

Generated: 02:A4:7F:3B:9C:E1

Properties:
  Format: Colon-separated (Linux/macOS)
  Type: Locally administered (safe for testing)
  Unicast: Yes (LSB of first octet = 0)
  Globally unique: No (bit 1 of first octet = 1)

Note: Locally administered addresses (bit 1 set) are safe
to use in any network without conflicting with real hardware.

Generating a Vendor-Specific MAC Address

Generate a MAC address that appears to come from a specific manufacturer:

Settings:
  OUI prefix: 00:1A:2B (Cisco Systems)
  Format: Colon-separated
  Count: 1

Generated: 00:1A:2B:7F:3C:A9

OUI: 00:1A:2B → Cisco Systems, Inc.
This address will appear as a Cisco device in network scans.

Use case: Testing software that identifies devices by manufacturer,
or simulating a Cisco device in a network test environment.

Bulk Generation for Virtual Machines

Generate 5 unique MAC addresses for virtual machine network interfaces:

Settings:
  Count: 5
  Type: Locally administered
  Format: Colon-separated
  Guarantee uniqueness: Yes

Generated addresses:
1. 02:A4:7F:3B:9C:E1
2. 02:B8:12:4D:7A:F3
3. 02:C3:9E:5F:2B:08
4. 02:D1:6A:8C:4E:77
5. 02:E7:3F:91:5D:B2

All 5 addresses are unique within this set.
Ready for use in VMware, VirtualBox, or Hyper-V configuration.

VMware Virtual Machine Configuration

Generate a MAC address in the format required by VMware:

Settings:
  OUI prefix: 00:50:56 (VMware)
  Format: Colon-separated

Generated: 00:50:56:A4:7F:3B

VMware .vmx configuration:
ethernet0.present = "TRUE"
ethernet0.addressType = "static"
ethernet0.address = "00:50:56:A4:7F:3B"

Note: VMware-assigned MAC addresses use the 00:50:56 OUI.
Using this prefix ensures the address looks like a legitimate
VMware virtual machine on the network.

Generating Addresses in Different Formats

Generate the same address in all formats for different systems:

Generated base address: 02:A4:7F:3B:9C:E1

All format variants:
─────────────────────────────────────────────────────────────────────
Linux/macOS (colon):    02:A4:7F:3B:9C:E1
Windows (hyphen):       02-A4-7F-3B-9C-E1
Cisco (dot):            02A4.7F3B.9CE1
Raw hex (no separator): 02A47F3B9CE1
Lowercase colon:        02:a4:7f:3b:9c:e1

Generating a Broadcast Address

The broadcast MAC address is used to send frames to all devices on a network segment:

Broadcast MAC Address: FF:FF:FF:FF:FF:FF

Properties:
  Type: Broadcast
  Scope: All devices on local network segment
  Use: ARP requests, DHCP discovery, network announcements

Use in iptables to allow broadcast traffic:
iptables -A INPUT -m mac --mac-source FF:FF:FF:FF:FF:FF -j ACCEPT

Generating IPv4 Multicast MAC Addresses

IPv4 multicast groups map to specific MAC address ranges:

IPv4 Multicast Group: 224.0.0.1 (All Hosts)

Corresponding Multicast MAC:
  01:00:5E:00:00:01

Mapping rule:
  - First 3 octets: 01:00:5E (fixed for IPv4 multicast)
  - Last 3 octets: lower 23 bits of IPv4 multicast address

Examples:
  224.0.0.1  → 01:00:5E:00:00:01  (All Hosts)
  224.0.0.2  → 01:00:5E:00:00:02  (All Routers)
  239.1.2.3  → 01:00:5E:01:02:03  (Custom group)

MAC Address Randomization Testing

Generate locally administered addresses to test applications that handle MAC randomization:

Settings:
  Type: Locally administered (simulates OS randomization)
  Count: 3
  Format: Colon-separated

Generated (simulating randomized MACs from a mobile device):
  02:A4:7F:3B:9C:E1  (first connection)
  02:B8:12:4D:7A:F3  (second connection, different random MAC)
  02:C3:9E:5F:2B:08  (third connection, different random MAC)

Locally administered bit: Set (bit 1 of first octet = 1)
  02 = 0000 0010 → bit 1 is set → locally administered

Use case: Test that your network access control system
handles devices that use MAC randomization correctly,
rather than assuming a device always uses the same MAC.

Generating for Network Simulation

Generate 10 MAC addresses for a network simulation with specific vendor distribution:

Settings:
  5 addresses with OUI 00:1A:2B (Cisco) — simulating switches/routers
  3 addresses with OUI 3C:22:FB (Apple) — simulating workstations
  2 addresses with OUI 00:50:56 (VMware) — simulating VMs

Generated:
Cisco devices:
  00:1A:2B:A1:B2:C3
  00:1A:2B:D4:E5:F6
  00:1A:2B:07:18:29
  00:1A:2B:3A:4B:5C
  00:1A:2B:6D:7E:8F

Apple devices:
  3C:22:FB:11:22:33
  3C:22:FB:44:55:66
  3C:22:FB:77:88:99

VMware VMs:
  00:50:56:AA:BB:CC
  00:50:56:DD:EE:FF