https://en.wikipedia.org/wiki/Shahab-3
They currently have 800 - 1200 mile range.
Yet, you seem to think they have no chance of getting to ICBM, 3400 miles?
https://en.wikipedia.org/wiki/Intercontinental_ballistic_missile
It's really just a matter of time. In addition, they are working with North Korea on it. Heck, we have private companies launching rockets to space, but Iran can't develop an ICBM? wrong.
You may not care, but trust me, our defense department does.