How can proxies be made?

[12]

I see alot of proxies being posted. I know that proxies are just different IP accesspoints but each IP must be assigned by an ISP right?
So how do some companies create immense amount of proxies? 
Like I don't think ISP's create 9000 new IPs at a time xD
Regardless, It's pretty cool how proxies can work.

[175]

It depends - mostly companies are given a block of IPs that they can use as they want. There are also 'residential' proxies that basically forward your connection through someones home IP as well.

If you want to try making your own proxy you can learn how to here; https://www.labnol.org/internet/setup-pr...ver/12890/