If you really think it will make a difference I can change your dedicated IP address once in case it was blocked in Iran before you started using it. I suspect that no matter what IP your site uses Iran will quickly block it as well. I'm not going to let you cycle through all of the IP addresses that Heliohost owns getting them each blocked one by one. The IP addresses all belong to Heliohost and users such as you are simply leasing them for a time. When you're gone someone else will need to be able to use them, and it would be unfair to the future user if none of them work in Iran or whichever other countries your site upsets. Let me know if you'd like to try changing the IP address once.