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MAC address, stands for Media Access Control Address, is a unique identifier assigned to a network interface for communications on the physical network segment. You don’t need to change it at all to make your network working, nor does Microsoft provide you an easy way of doing so.
TCP/IP computer networks use both the IP addresses and MAC addresses of connected client devices. While the IP address changes over time, the MAC address of a network adapter always stays the same.
There are several reasons you might want to know the MAC address of a remote computer, and it's easy to do by using a command line utility such as Command Prompt in Windows.
A single device can possess multiple network interfaces and MAC addresses. A laptop computer with Ethernet, Wi-Fi, and Bluetooth connections, for example, has two or sometimes three MAC addresses associated with it, one for each physical network device.
Why to Figure Out a MAC Address?
Reasons to track down the MAC address of a network device include:
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- To set up MAC address filtering on a router to restrict local network access to only those devices whose addresses match a list of presets.
- To determine the device's manufacturer (first half of the address) and serial number (second half of the address) for service.
- To masquerade (spoof) the identity of a different device. MAC addressing spoofing can be used legitimately to register a home network gateway device with an internet provider. It can also have malicious intent, such as to defeat the MAC address filtering feature to break into the network.
Limitations of MAC Address Lookups
It isn't usually possible to look up MAC addresses for devices that are outside a person's physical reach. It often isn't possible to determine the MAC address of a computer from its IP address alone because these two addresses originate from different sources.
A computer's hardware configuration determines its MAC address, while the configuration of the network it is connected to determines its IP address.
However, if the computers are connected to the same TCP/IP network, you can determine the MAC address through a technology called ARP (Address Resolution Protocol), which is included with TCP/IP.
Using ARP, each local network interface tracks both the IP address and MAC address for each device it has recently communicated with. Most computers let you see this list of addresses that ARP has collected.
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How to Use ARP to Find a MAC Address
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In Windows, Linux, and other operating systems, the command line utility arp shows local MAC address information stored in the ARP cache. However, it only works within the small group of computers on a local area network (LAN), not across the internet.
There's another method used to find the MAC address of the computer you're currently using, which involves using the ipconfig /all command in Windows. Website design tool for mac.
ARP is intended to be used by system administrators and is not a typically useful way to track down computers and people on the internet.
Here is one example of how to find a MAC address via an IP address. Start by pinging the device you want the MAC to address for:
You will want to use a local address, so if your network is 10.0.1.x, then use that number to ping, as in the image below.
The ping command establishes a connection with the other device on the network and should show a result like this:
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Use the following arp command to get a list that shows the MAC address of the device you just pinged:
The results may look something like this but probably with many other entries:
Find the device's IP address in the list; the MAC address is shown right next to it. In this example, the IP address is 192.168.86.45 and its MAC address is 98-90-96-B9-9D-61 (they're in bold here only for emphasis).
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Check Your Router's Connection Data
To find the MAC address of the device connected to your router, assuming you can access the router's administrative control panel, log in and check for connected devices. Each active device, as well as recently connected devices, should list the local IP address as well as the MAC address.
Categories: Windows | Media Access Control (MAC) Addresses
In other languages:
Español: cambiar la dirección MAC de una computadora en Windows, Italiano: Cambiare l'Indirizzo MAC della Scheda di Rete su Windows, Deutsch: Die MAC Adresse eines Computers unter Windows ändern, Русский: изменить MAC адрес сетевого адаптера в Windows, Português: Mudar o Endereço MAC de um PC com Windows, 中文: 在Windows中变更电脑的Mac地址, Français: changer l'adresse MAC d'un ordinateur sous Windows, Nederlands: Het Mac adres van je pc wijzigen, Bahasa Indonesia: Mengubah Mac Address Komputer pada Windows, العربية: تغيير عنوان MAC في جهاز كمبيوتر يعمل بنظام Windows, हिन्दी: विंडोज़ में एक कंप्यूटर का मैक एड्रेस बदलें, Čeština: Jak změnit MAC adresu počítače s Windows, ไทย: เปลี่ยน Mac Address ของเครื่อง Windows, Tiếng Việt: Thay đổi địa chỉ MAC trên Windows, 한국어: 윈도우에서 컴퓨터의 맥 주소 변경하는 방법
Mac Address Lookup
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