AMERICAN FLIGHT SUPPORT will apply directly to Iran, they communicate well. If you’re from the US, however, you’ll need to be aware of sanctions for dealing directly with Iran, or agencies in Iran. We’ll use an approved agent if you’re from the US (i.e. not an Iranian company).
Iran doesn’t work on Fridays, so be aware there.
Keep an eye on safeairspace.net for risk factors when flying over or to Iran.