You should also note that domains and subdomains that you add to the hosting on your existing account sometimes gets assigned a different IP address from the one you originally got.
If for some reason your site has been assigned to an IP address which is blocked in your country, you should try submitting a support ticket asking for a different IP address or perhaps a server move.
If you do get another account, remember that you can't move domains already hosted at DreamHost to an account that has a promo code benefit or that has been referred. This is to keep people from rotating their sites between promotional accounts.
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