can anyone told me about any best software that changed ip automatically after some time.
Thanks for your question nncthomas4.
I'm not aware of such a software.
Generally, there needs to be some physical change to the devices connecting to the internet connection to produce a new IP. You didn't identify the type of connection or the hardware you are using so I can't be more detailed.
Why do you feel the need to change your IP? Other then in China, I'm not aware of a country where the IP address publicly identifies the user. The best it should do is offer a region or town and even that is not always accurate.