What TCP ports do iPhone apps typically use?

I work at a college that has a very closed wifi system. Many iOS apps will not work on college wifi due to lack of connection, supposedly. I suspect the problem is that some/many apps use a non-standard port which we have blocked. Unfortunately, the errors returned from the apps are very generic: Login unsuccessful; Initialization error; etc. For instance, gasbuddy works, gasbuddy.hess does not work. Flipboard does not work. All work on my home wifi network.
I have asked a couple of app developers for port numbers and they will not divulge. Our IT security officer will not open up all ports on the wifi system, only specific ports and port ranges.
Is there a solution so that we can open up a range of ports for our users on iOS devices, or will we be doomed to have "dumbphones" here at the college?

That's going to vary wildly from app to app. Short of putting a sniffer on the network and watching the traffic generated by each app individually, I doubt you're going to get that information.

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