Subnet Mask is short for subnetwork, which means small networks in a large network. For faster data transferring, networks are broken up into small networks, i.e. subnetworks. Routers achieve this by using subnet masks, a number looks like an IP address but determines the subnetwork. For some tasks you may need a subnet mask address, it is easy to find a subnet mask. Here is how to find a subnet mask in Windows, macOS, and Linux operating system.
How to view subnet mask in Windows
Using Command Prompt:
1. Press ‘Windows + R’ button and launch command prompt. Or, click ‘Start’ icon > type “command prompt” in search > press ‘Enter’ > click ‘Command Prompt’ in results.
2. In the command prompt, type “ipconfig /all.” Type exactly as it is given, without quotes and does not remove the space.
3. Press ‘Enter’ key. Running windows ipconfig program command will bring up a list of networks with information.
4. Find the ‘Subnet Mask’ line in ‘Ethernet adapter Local Area Connection’ section.
5. The address given next to Subnet Mask is your subnet mask. Most of the subnet masks numbers start with ‘255’. For example, 255.XXX.XXX.X.
From Control Panel:
Here is one more way to find the subnet mask in Windows computer.
• Visit ‘Control Panel’.
• Open ‘Network & Internet’.
• Click the ‘Network and Sharing Center.’
• Click ‘Change adapter settings’ or ‘Manage Network Connections,’ according to your Windows.
• Right-click on ‘Local Area Connection.’
• Click ‘Status’.
• Then, click ‘Details.’
• You’ll find your subnet mask number here.
How to view subnet mask in Mac
1. Click the ‘Apple Logo’ at the top left corner.
2. Select ‘System Preferences..’.
3. Click the ‘Network’ in the System preferences window. If you didn’t find it, use the search bar to get the network settings easily.
4. In the left menu you’ll see a list of network connection, select the network connection you’re connected with.
5. Look for the ‘Subnet Mask’ labeled in the right side pane. The address given next to Subnet Mask is your subnet mask. If it is not given here, use the next steps.
6. Click ‘Advanced..’ button near the bottom right corner.
7. Open ‘TCP/IP’ tab.
8. Now, here you’ll find your subnet mask.
If the ‘Subnet Mask’ field is blank, then maybe you’re using a local IPv6 network. And IPv6 network doesn’t use subnet masks. If you’re connected online, try below steps:
1. Open ‘Configure IPv4’ dropdown.
2. Select ‘Using DHCP.’
3. Then click ‘Renew DHCP Lease’ button at the right side.
How to view subnet mask in Linux
1. Open ‘Command Line’. If you don’t know how to open this, check the specific instruction for your Linux.
2. Now, type “ifconfig” command in the command line.
3. Press ‘Enter’ key.
4. You’ll see different information on your screen, find the label ‘Mask or Subnet Mask.’
5. The address given next to Subnet Mask is your subnet mast. Most of the subnet masks numbers start with ‘255’. For example, 255.XXX.XXX.X.
John Hunt is a creative person who has been writing blogs and articles about cyber security. He writes about the latest updates regarding McAfee.com/activate and how it can improve the work experience of users. His articles have been published in many popular e-magazines, blogs and websites.
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