Look at the first octet value and check the corresponding range.
1-126 class A, subnet mask 255.0.0.0
128-191 class B, subnet mask 255.255.0.0
192-223 class C, subnet mask 255.255.255.0
That could be a default subnet mask for a class C network.A mask used to determine what subnet an IP address belongs to. An IP address has two components, the network address and the host address. For example, consider the IP address 150.215.017.009. Assuming this is part of a Class B network, the first two numbers (150.215) represent the Class B network address, and the second two numbers (017.009) identify a particular host on this network.Subnetting enables the network administrator to further divide the host part of the address into two or more subnets. In this case, a part of the host address is reserved to identify the particular subnet.
The address you gave is not an IP address; it has the appearance of a subnet mask. It could be a class A or class B subnet mask.
Class A default is 255.0.0.0 Class B default is 255.255.0.0 Class C default is 255.255.255.0
The default subnet mask for this address - a class A address - is 255.0.0.0 (same as /8).
it is a class c address..so default subnet mask is 255.255.255.0 it is a private address...
255.255.0.0255.255.0.0 is the default for a class B address
The default subnet mask would be 255.255.0.0 for a class B address.
172.16.0.0. The first ip address within this subnet is 172.16.0.1
Since this is a Class C address, the default network mask is 255.255.255.0.Since this is a Class C address, the default network mask is 255.255.255.0.Since this is a Class C address, the default network mask is 255.255.255.0.Since this is a Class C address, the default network mask is 255.255.255.0.
Since 157.54.4.201 falls in the class B address range the default subnet mask would be: 255.255.0.0 128 - 191 is a class B address.
It isn't an address at all. It looks like a subnet mask, and by itself has no class meaning.
195.85.8.0 is a class C network. The subnet mask would be 255.255.255.0 and the network address is 195.85.8.0