you can't. There's no way to know from an IP address wha the subnet mask is.
However, there are some likely guesses. Since 195.0.8.0 ends with a zero, the subnet is probably a 24-bit mask: 255.255.255.0
But it doesnt have to be. The network administrator knows for sure.
fm
220.220.220.0 is an invalid subnet mask.
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Without a subnet mask a client is not able to participate on a network because the network software is unable to determine the network addresses.
It does not require a subnet mask.
If this is a default subnet mask, then it would be a class C subnet mask. If you are subnetting a network and this is not the default subnet mask, then it could be either a class A or class B.
To determine the network or subnet address of an IP address
binary ANDing
binary ANDing
The default subnet mask has a standard size. The custom subnet mask allows you to make subnets that are smaller or larger than the default.
The correct term is subnet mask instead of subnet mass. A subnet mask separates an IP address into the host address and the network address. It is a 32-bit number that can mask an IP address.
2 given subnets
255.255.255.0