mask the network mask with the ip to get the network address which will not be assignable but the next address will be assignable and will be the first assignable address and then find the last address by assigning all 1's after the network mask bits (here after 25th bit starting from left) and you will get 128.44.82.127 which is again the broadcast address so the last assignable address will be 1 less than this i.e 128.44.82.126