A public ip (or external ip) is the one you get from your ISP. This is the one used across the internet.
Whereas the one you get from your router is a private ip (usually its a 192.168.x.x one).
If, for some reason, you don't know what is your external IP-address, you can use one of available on-line detection tools: see related link.
192.168.0.254 is a valid "class C" IP address.
The difference is in the IP range. The multicast IP range is 224.0.0.0 - 239.255.255.255
255.1.0.0
255.1.0.0
IP address is categorized into IPv4 and IPv6. The IP is valid only if it is in the range of IP address range class. If you question whether or not the IP is really that of a safe site, you can do an IP lookup using an IP lookup tool. They are available free and can be found by doing a search using the term "IP lookup."
Class A IP address.
2
192.168.x.x is an IP address in the private IP address range.
The class C range is 192.0.0.0 - 223.255.255.255
I can't provide you with a specific New Zealand IP address, as IP addresses are assigned dynamically and are subject to availability. However, a common example of a New Zealand IP address could be in the range of 202.27.64.0 to 202.27.127.255, often used by ISPs. A typical subnet mask for such a range might be 255.255.255.0.
If you have changed DHCP ip range, the ip address for your router has changed too. You can find your router ip address in your wireless adapter information.
Yes, the IP address 11.63.72.21 is a public IP address. Public IP addresses are assigned to devices that directly connect to the internet and can be accessed from outside a local network. In this case, the address falls within the range of public IPs and is not part of the reserved private IP address ranges.