DNS records and worldwide DNS propagation checker

MAC Address Generator Online

Maximum 6 character (A-F,0-9).
Generated MAC Addresses:

    About MAC Address Generator Online

    The MAC Address Generator generates the random number of MAC addresses for your testing purposes. The tool provides the option to specify the custom prefix (OUI). And can generate the four most commonly used MAC address formats in upper and lower case for your convenience.

    What is MAC Address, and why is it used?

    Like the house with its postal address, every device on the internet has a unique MAC Address that identifies it on the network.

    Either working on a wired or a wireless network. One thing is common in both environments. To communicate between two networked devices, we need network software and hardware.

    Here, the software address refers to IP Address, and the hardware address refers to the MAC Address tied with the network hardware of your key connected device called Network Adapter or NIC (Network Interface Card).

    Thus, the MAC or Media Access Control Address is a unique identifiable address, usually printed on the network hardware of your key connected device. It identifies the hardware manufacturer and works along with IP Addresses for network communication between devices on the network.

    The Media Access Control (sub-layer of the Data-Link Layer (DLC) of telecommunication protocols) uses that address.

    The Network Adapter or NIC always comes with the MAC Address, hardcoded and stored in its hardware, usually in its ROM (Read Only Memory) or BIOS (Basic Input/Output System). By default, that address is fed into the network hardware during manufacturing by its manufacturer. Therefore, MAC Address is also called a Networking Hardware Address, Burned-in Address (BIA), Physical Address, or Ethernet Hardware Address.

    MAC Address format

    The MAC Address is a 48-bit Address. Traditionally, 12-digit (6 bytes or 48-bit) hexadecimal number. The 48-bit space means there are potentially 281,474,976,710,656 possible MAC Addresses.

    Although, different formats are there to write the MAC Address. But, it's usually written in one of the following three formats.

    • Hyphen-Hexadecimal notation = MM-MM-MM-SS-SS-SS
    • Colon-Hexadecimal notation = MM:MM:MM:SS:SS:SS
    • Period-separated Hexadecimal notation = MMM.MMM.SSS.SSS
    Note: Linux OS uses Colon-Hexadecimal notation, and Cisco Systems use Period-separated Hexadecimal notation.

    What is an OUI MAC Address?

    An OUI (Organizationally Unique Identifier) is the part of the MAC Address that defines the hardware manufacturer. It's the leftmost six digits (24 bits), also called prefixes, and is associated with the hardware manufacturer.

    The IEEE is responsible for OUI distribution and issues it to their registered manufacturers. Sometimes, manufacturers possess several prefix numbers associated with their products. And it's common in large manufacturers to have more than one set of OUIs. For example, the prefixes 00-13-10, 00-25-9C, and 68-7F-74 (plus others) belong to Linksys (Cisco Systems).

    The OUI of some well-known manufacturers are as follow

    • Dell: 00-14-22
    • Nortel: 00-04-DC
    • Cisco: 00-40-96
    • Belkin: 00-30-BD
    • Huawei: 00-9A-CD
    • Hewlett Packard: 3C-D9-2B
    • Google, Inc: 3C-5A-B4

    What is a Network Interface Controller of the MAC Address?

    A Network Interface Controller is the part of the MAC Address that defines the device portion. The rightmost six digits (24 bits) are associated with device identification. All the devices manufactured by the same manufacturer have unique 24-bit numbers. But, hardware devices from different manufacturers may share the same device identification address.

    How to use the MAC Address Generator to generate the random number of MAC Addresses?

    The MAC Address Generator allows you to generate the random MAC Addresses for testing purposes. To generate the MAC Addresses, perform the following steps.

    1. Open the MAC Address Generator Online.
    2. Enter the MAC Address prefix. Its maximum length must be six characters. However, that is an optional field.
    3. Select the MAC Address format. The tool allows you to select from the four most commonly used formats.
    4. You can choose either you need MAC Address in upper case or lower case.
    5. Select the number of random MAC Addresses you want to generate.
    6. After filling in the above requirements, click on the "Generate MAC Address" button.
    7. The tool processes your request and provides you with the desired result.
    Note: These generated MAC Addresses are only for testing purposes, not for production purposes.


    What is the EUI-64 MAC Address?

    Traditionally, the MAC Addresses are 48-bit in length, 24-bit for the OUI, and 24-bit for the Network Interface Controller.

    The EUI-64 is an extended unique identifier and stands for 64-bit MAC Address. The OUI portion is the same 24-bit, like in 48-bit MAC Address. But for the Network Interface Controller, it goes to 60-bit. That allows for far more MAC Addresses compared to a 48-bit address.

    How do I find out where a MAC address belongs to?

    For that, first get the MAC Address of a device. If you want to find a specific MAC Address manufacturer, please use our MAC Address Tracker. The tool searches a given MAC Address or OUI in MAC Address Vendor Database. It provides information about the manufacturer that manufactured that device, the prefix, postfix of a given MAC Address. Or if you want to find MAC Addresses ranges associated with a specific manufacturer. Enter a manufacturer's name (like Cisco or Cis) to check its MAC Address ranges and details.

    Moreover, DNSChecker also provides the MAC Address Vendor Lookup API. The documentation is designed for developers who desire to query MAC Address to get Vendor / Manufacturer / Company name, its Address, Prefix and Postfix about any given MAC Address in MAC Address Vendor Database.

    What is MAC filtering?

    Our wireless networks use MAC filtering to filter out the hackers or intruders to prevent unwanted network access. In MAC filtering, the router is configured to accept the traffic only from specific MAC Addresses. Even if DHCP changes the IP Addresses of those particular MAC Addresses, they are still approved to communicate with the network. Thus, the hijacker that hijacks the IP Address still gets blocked by the network because of an unauthorized MAC address.