Find subnet mask from IP address

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IP address
Subnet mask
How do I find out subnet mask from IP address?
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Welcome to ITKE, Abeerfarooq64! I would suggest checking out an article from SearchNetworking: IP addressing and subnetting – Calculate a subnet mask using the subnet’s formula.

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  • Elizine
    Please refer to this link - https://searchnetworking.techtarget.com/answer/How-are-IP-addresses-and-subnet-masks-calculated
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  • chiragshah
    you need cidr value for that
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  • TheRealRaven
    In general, you don't know a subnet mask simply from knowing an IP address. If it's a local address, it's possible to use various functions (i.e., DNS APIs) to retrieve info about the interface that is bound to the address, and then to extract attributes such as subnet mask from that point. But the address itself won't tell you enough.
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  • Subhendu Sen
    There are lots of command/ gui that can help to find ip address/ subnet mask or other details. But specially commands depend on OS like windows/linux/mac.
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  • Meghabhardwaj
    you have to learn subnetting of diffrent classes...
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  • TheRealRaven
    And you can't find "the" subnet mask from an IP address. You can only determine the largest valid subnet mask.
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