|What does 4 different networks have to do with your situation?|
There is this thing called supernetting where you can combine ip ranges like when you have grown from a single class c but don't need a class b. You can combine two class c address ranges together into one subnet.
You are doing exactly the opposite of that. You are taking a single class c subnet and dividing it into 4 networks. This is usually done to separate the networks.
Where is this coming from? What made you think having 3 networks, one on each pc would accomplish what you want?
BTW the solution is simple. You have two choices.
Keep existing subnet mask but only use ips 2-63
Keep existing ips and use subnet mask 255.255.255.0
Then every pc will see each other. I am surprised to learn wireless supports promisious mode which is why bridging is working for you. Last I heard this mode wasn't supported on wireless.
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