What is my IP address from what country?

Can you tell country from IP address?

I am writing a program to find out country and IP of visitors. When I use ip2long, ip2geo and geoip2text I get result like this: Country name. USA. IP address. 198.252.206.10
Country name. United States. 192.168.103
United Kingdom. 66.82.234.45
91.205.96.25
Australia. 151.101.64.21
How can I get only country name? I mean, for example if I use UK address, then I want the output like this: 91.25 What's the best way to do it? The following will give you what you want:

How are IP addresses assigned by country?

By example: in USA how many internet providers are connected to the backbone?

Each ISP assigns their own private ranges to assign customers. The Internet backbones run their routing infrastructure based on who can pay for it the cheapest and can handle the load as well. This generally is a very large enterprise where companies pay to lease a block of IP addresses.

In smaller organizations, or a single ISP, they just share the same block, often with the same subnet structure that a company would use, since that will be cheaper to maintain. Often times you will see something like 192.168.0.1/24, or 192. This is an example of a Class B address space. Each of those groups, 192.0/16 and 192.0/16, are typically reserved for the "local" subnet of an organization.