 Each Hamachi client is normally assigned an IP address when it logs into the system for the first time.To avoid conflicting with existing private networks on the client side the normal private IP address blocks 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 are not used.Before November 19, 2012 the 5.0.0.0/8 range was used.