There isn't just a single subnet mask that could be used for that address. The default subnet mask would be 255.0.0.0, but there could be others if the network is subnetted.
Example IP address of 192.168.1.123 with a subnet mask of 255.255.255.0
This is a network address
255.255.255.0
what is the subnet mask for this hst IP prefix format ? Host IP Address: 183.91.104.16
Because each IP defines certain subnet mask.
if the ip address is 192.168.2.1 then the subnet mask should be 255.255.255.0
Subnet mask for the above is 255.0.0.0
it is a class c address..so default subnet mask is 255.255.255.0 it is a private address...
That depends on the subnet's subnet mask.
255.255.0.0
255.255.255.0
There is no set subnet mask for different ip configurations. The most common default subnet mask is 255:255:255:0 though, if that helps.