MAC Address Lookup
Lookup manufacturer from MAC address OUI. Validate and format MAC addresses in multiple formats including colon, hyphen, and dot notation.
Accepts formats: 00:1A:2B:3C:4D:5E, 00-1A-2B-3C-4D-5E, 001A2B3C4D5E
Enter a MAC address above to lookup manufacturer and format information
Common OUI Database
| OUI | Manufacturer |
|---|---|
| 00:00:0C | Cisco Systems, Inc. |
| 00:00:0E | Fujitsu Limited |
| 00:00:10 | Sytek Inc. |
| 00:00:1B | Novell Inc. |
| 00:00:5E | IANA (Internet Assigned Numbers Authority) |
| 00:01:42 | Cisco Systems, Inc. |
| 00:01:43 | Cisco Systems, Inc. |
| 00:0C:29 | VMware, Inc. |
| 00:0D:3A | Microsoft Corporation |
| 00:0F:1F | Dell Inc. |
| 00:0F:20 | Dell Inc. |
| 00:10:18 | Broadcom Corporation |
| 00:10:DB | Juniper Networks, Inc. |
| 00:11:43 | Dell Inc. |
| 00:12:3F | Dell Inc. |
| 00:13:72 | Dell Inc. |
| 00:14:22 | Dell Inc. |
| 00:15:5D | Microsoft Corporation |
| 00:16:3E | Xensource, Inc. |
| 00:17:A4 | Dell Inc. |
| 00:18:8B | Dell Inc. |
| 00:19:B9 | Dell Inc. |
| 00:1A:A0 | Dell Inc. |
| 00:1B:21 | Dell Inc. |
| 00:1B:63 | Apple, Inc. |
| 00:1C:42 | Parallels, Inc. |
| 00:1D:09 | Dell Inc. |
| 00:1E:4F | Dell Inc. |
| 00:1E:C9 | Dell Inc. |
| 00:21:5D | Dell Inc. |
| 00:21:70 | Dell Inc. |
| 00:21:9B | Dell Inc. |
| 00:22:19 | Dell Inc. |
| 00:22:FB | Dell Inc. |
| 00:23:AE | Dell Inc. |
| 00:24:E8 | Dell Inc. |
| 00:25:64 | Dell Inc. |
| 00:26:0A | Dell Inc. |
| 00:26:B9 | Dell Inc. |
| 00:50:56 | VMware, Inc. |
| 08:00:07 | Apple, Inc. |
| 08:00:09 | Hewlett Packard |
| 08:00:20 | Sun Microsystems |
| 08:00:27 | Teknowledge Inc. |
| 10:00:5A | IBM Corp |
| B8:27:EB | Raspberry Pi Foundation |
| DC:A6:32 | Raspberry Pi Trading Ltd |
| E4:5F:01 | Raspberry Pi Trading Ltd |
| B8:AE:ED | Amazon Technologies Inc. |
| 00:50:F2 | Microsoft Corporation |
This database contains 50 of the most common OUIs. The complete IEEE registry contains over 40,000 entries.
MAC Address Format Guide
Colon-Separated (IEEE 802)
Most common format, used by Linux and networking equipment
00:1A:2B:3C:4D:5EHyphen-Separated
Used by Windows and Microsoft systems
00-1A-2B-3C-4D-5EDot-Separated (Cisco)
Used by Cisco networking equipment (groups of 4 hex digits)
001A.2B3C.4D5ENo Separator
Raw hexadecimal format, used in some programming contexts
001A2B3C4D5EFrequently Asked Questions
What is a MAC address?
A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communications on the physical network segment. It consists of 48 bits (6 bytes) typically displayed as 12 hexadecimal digits. The first 3 bytes (24 bits) form the OUI which identifies the manufacturer, while the last 3 bytes are device-specific.
What is OUI?
OUI (Organizationally Unique Identifier) is the first 24 bits of a MAC address. It uniquely identifies the manufacturer or organization that produced the network interface card. The IEEE Registration Authority assigns OUIs to manufacturers to ensure global uniqueness of MAC addresses.
What MAC address formats are supported?
This tool accepts MAC addresses in multiple formats: colon-separated (00:1A:2B:3C:4D:5E), hyphen-separated (00-1A-2B-3C-4D-5E), dot-separated (001A.2B3C.4D5E), or no separator (001A2B3C4D5E). All formats are automatically recognized, validated, and can be converted between formats.
Why is the manufacturer not found?
The tool uses a database of the top 50 most common OUIs from major manufacturers like Apple, Cisco, Dell, VMware, and Raspberry Pi. If your MAC address manufacturer is not found, it means the OUI is not in our curated database. The IEEE maintains a complete registry of all assigned OUIs at standards-oui.ieee.org which contains over 40,000 entries.
Can MAC addresses be changed?
While the hardware MAC address is permanently burned into the network interface card (BIC - Burned-In Address), most operating systems allow you to set a custom MAC address through software (MAC spoofing). However, the manufacturer OUI in a spoofed MAC address may not match the actual hardware manufacturer.
Are MAC addresses unique?
MAC addresses are designed to be globally unique. Manufacturers are assigned unique OUIs by the IEEE and are responsible for ensuring that all devices they produce have unique MAC addresses within their OUI block. However, duplicate MAC addresses can occur due to manufacturing errors, cloned devices, or intentional MAC spoofing.