What do you mean by when you say a ipaddress is REAL? Little confused there ...u mean a dynamic external ip?
Well, yes, i'd say that means your external ip (visible for the world) is the same as ip on your side of network cable given by ISP.
The easiest way to check if your ip is real is to compare:
- the external ip in your router admin panel status
- and the ip given by any site shows "Your public IP address".
If these addresses are similar then your ip is real.
Otherwise your ip is gray and nothing help you to be happy.