Tools
MAC Address Tool
Parse, validate, and format MAC addresses. Look up vendor information from the OUI and convert between different notation styles.
MAC Address Input
Supports any format: colons, hyphens, dots, or no separator
Invalid MAC address format. Please enter 12 hex characters.
MAC Address Structure
OUI
XX:XX:XX
NIC
XX:XX:XX
OUI (Organizationally Unique Identifier): First 24 bits, assigned by IEEE to manufacturers.
NIC (Network Interface Controller): Last 24 bits, assigned by manufacturer.
Special Bit Flags
| Bit | 0 | 1 |
|---|---|---|
| LSB of 1st octet | Unicast | Multicast |
| 2nd bit of 1st octet | Universal (UAA) | Local (LAA) |
MAC Address Format Examples
| Format | Example | Used By |
|---|---|---|
| Colon-separated | 00:1B:63:A1:B2:C3 | Linux, macOS, IEEE |
| Hyphen-separated | 00-1B-63-A1-B2-C3 | Windows |
| Dot-separated | 001b.63a1.b2c3 | Cisco IOS |
| No separator | 001B63A1B2C3 | Various |
Special MAC Addresses
- FF:FF:FF:FF:FF:FF — Broadcast address
- 00:00:00:00:00:00 — Null/unspecified
- 01:00:5E:xx:xx:xx — IPv4 multicast
- 33:33:xx:xx:xx:xx — IPv6 multicast
Virtual Machine OUIs
- 00:50:56, 00:0C:29 — VMware
- 00:15:5D — Microsoft Hyper-V
- 08:00:27 — Oracle VirtualBox
- 52:54:00 — QEMU/KVM